Here you’ll find 63 Slang words that start with F that begin with F, organized from “FOMO” to “fuzzy”. Many entries are internet-born abbreviations, playful descriptors, or regional terms used in informal speech worldwide.
Slang words that start with F are informal terms, abbreviations, or playful expressions common in casual speech and online. A notable example is “FOMO,” which rose to popularity on social media and entered everyday language.
Below you’ll find the table with Term, Meaning, Region, Register, Example, and Source.
Term: The slang word or phrase as written; you use this to find or reference the exact informal form.
Meaning: A concise, plain-language definition so you quickly understand how the term is used in context.
Region: Notes where the slang is commonly used, helping you spot regional differences or global reach.
Register: Indicates how casual or offensive the term is, so you choose language appropriate to your audience.
Example: A short sentence showing everyday use, which helps you see tone and correct placement.
Source: Brief citation or note on origin or evidence, so you can trace when and where the term emerged.
Slang words that start with F
| Term | Part of speech | Meaning | Region/Register |
|---|---|---|---|
| faff | verb | To waste time on ineffectual or trivial activities; to fuss or dither. | UK informal |
| fag | noun | A cigarette. | UK slang |
| fair dinkum | adjective | Genuine, real, or true. | AUS slang |
| fam | noun | Close friends, considered as close as family. | UK/US informal; Youth slang |
| fanny | noun | The female genitals. | UK slang; Vulgar |
| fasho | adverb | For sure; definitely. | US slang; AAVE |
| fave | noun | A favorite person or thing. | Informal |
| feds | noun | Federal law enforcement agents, or police in general. | US slang; AAVE |
| fella | noun | A man or boy; a boyfriend. | Informal; often UK/AUS |
| fender bender | noun | A minor car accident. | US informal |
| festy | adjective | Dirty, gross, or disgusting. | AUS slang |
| fiddlesticks | interjection | An expression of mild annoyance or disagreement. | Dated; Euphemistic |
| filch | verb | To steal something of little value in a casual way. | Informal; Slightly dated |
| fin | noun | A five-dollar bill. | US slang; Dated |
| fina | adverb | A form of “going to” or “about to.” | US slang; AAVE |
| fink | noun | An unpleasant or contemptible person, especially an informer. | US slang; Dated |
| finsta | noun | A secondary, private Instagram account for close friends. | Internet slang; Youth slang |
| fire | adjective | Excellent, amazing, or very cool. | US informal; Youth slang |
| fit | adjective | Physically attractive or sexy. | UK slang |
| fiver | noun | A five-pound note or five-dollar bill. | UK/US slang |
| flack | noun | Harsh criticism or opposition; negative publicity. | US informal |
| flaky | adjective | Unreliable; likely to cancel plans or forget things. | Informal |
| flannel | noun | A flannel shirt. | US/AUS informal |
| flapper | noun | A fashionable young woman in the 1920s. | Historical slang; Dated |
| flat out | adverb | As fast or as hard as possible; completely. | Informal; especially UK/AUS |
| flex | verb | To show off or boast, especially about wealth or possessions. | US informal; Youth slang |
| flicks | noun | The movies; a movie. | Informal; Slightly dated |
| flimsy | adjective | Weak, unconvincing, or insubstantial. | Informal |
| flip-flops | noun | Open-toed sandals with a thong between the big toe and the next. | Informal |
| flip out | verb | To become suddenly very angry or lose self-control. | Informal |
| flog | verb | To sell something. | UK/AUS slang |
| flop | noun | A complete failure, especially a commercial or artistic one. | Informal |
| flub | verb | To make a clumsy mistake; to botch something. | Informal |
| fluke | noun | A surprising piece of luck; an unlikely chance occurrence. | Informal |
| flummoxed | adjective | Bewildered, confused, or perplexed. | Informal; especially UK |
| flunk | verb | To fail an exam, test, or course. | US informal |
| flurry | noun | A sudden, brief burst of activity or excitement. | Informal |
| flustered | adjective | Agitated, confused, or nervous. | Informal |
| fly | adjective | Stylish, cool, and fashionable. | US slang; Dated (1980s-90s) |
| FOMO | noun | Fear Of Missing Out; anxiety about missing exciting events. | Internet slang |
| foodie | noun | A person with a particular interest in food; a gourmet. | Informal |
| fool | noun | A person who acts unwisely; an idiot (can be playful). | Informal |
| footy | noun | Football (usually Australian Rules, Rugby League, or Soccer depending on region). | AUS/UK slang |
| for real | phrase | Seriously; genuinely or truly. | Informal |
| four-eyes | noun | A derogatory term for a person who wears glasses. | Pejorative; Dated |
| foxy | adjective | Sexually attractive (usually describing a woman). | Slang; Dated |
| fr | adverb | For real; a shorter version used in texting. | Internet slang; Youth slang |
| frat | noun | A college fraternity. | US informal |
| freak out | verb | To have a sudden, intense emotional reaction. | Informal |
| freaking | adjective | Used as an intensive to express annoyance, surprise, or emphasis. | Euphemistic slang |
| fresh | adjective | New, cool, stylish, or original. | US slang; Dated (1980s-90s) |
| friend zone | noun | A situation where one person desires a romantic relationship but is seen only as a friend. | Informal |
| frigging | adjective | Used to express annoyance or for emphasis. | Euphemistic slang |
| frills | noun | Unnecessary extra features or embellishments. | Informal |
| fritz | noun | Broken or not working correctly. | Informal |
| front | verb | To pretend to be something you’re not; to put on a false appearance. | US slang; AAVE |
| frothy | noun | A beer. | AUS slang |
| FUBAR | adjective | Fouled Up Beyond All Recognition/Repair. | Military slang; Profane |
| fuddy-duddy | noun | A fussy, old-fashioned, or conservative person. | Informal; Dated |
| full monty | noun | The whole thing; the full extent of something. | UK slang |
| funky | adjective | Having a strong, unconventional style; also, having a bad smell. | Informal |
| fuzz | noun | The police. | Slang; Dated |
| fuzzy | adjective | Unclear, blurry, or indistinct. | Informal |
Descriptions
faff
A very common British expression for unproductive busyness. “Stop faffing about and get ready to go.”
fag
Not to be confused with the offensive US slur for a gay man. “I’m popping outside for a fag.”
fair dinkum
A classic Australian phrase expressing sincerity or authenticity. “This is a fair dinkum emergency.”
fam
Originally from AAVE and London slang, now widespread. “What’s up, fam? It’s good to see you.”
fanny
In the US, it refers to the buttocks and is much milder. “Be careful with that bike; don’t hurt your fanny.”
fasho
A casual, shortened form of “for sure.” “Are you coming tonight? Fasho.”
fave
A simple clipping of the word “favorite,” used very commonly. “That song is my absolute fave.”
feds
Often used in hip-hop and crime-related contexts. “He got paranoid when he saw the feds.”
fella
A casual and friendly term for a man. “She’s going to the movies with her new fella.”
fender bender
Describes a collision with very little damage, usually just to the fender. “We were late because of a fender bender on the freeway.”
festy
Often used to describe a person or a place that is unpleasantly grimy. “Clean your room, it’s getting festy in here.”
fiddlesticks
A very old-fashioned and harmless alternative to a stronger curse word. “Oh, fiddlesticks! I’ve forgotten my keys again.”
filch
Implies petty theft or pilfering. “He would always filch pens from the office supply closet.”
fin
From the Yiddish word “finif” for five. “Can you lend me a fin until Friday?”
fina
A nonstandard but very common phonetic spelling of “fixing to.” “I’m fina go to the store.”
fink
Often associated with gangsters or union disputes from the mid-20th century. “He was a fink who told the boss everything.”
finsta
A portmanteau of “fake” and “Instagram,” for more authentic posts. “I only post my goofy photos on my finsta.”
fire
A popular term of high praise, especially in music and fashion. “That new track is absolute fire.”
fit
A very common compliment in Britain, primarily used to describe people. “I think your new flatmate is really fit.”
fiver
Universally understood in the UK for £5. “Can you lend me a fiver for lunch?”
flack
Often used in media, PR, and politics. “The politician caught a lot of flack for his comments.”
flaky
Describes someone who is inconsistent and doesn’t follow through. “She’s too flaky to be my project partner.”
flannel
A casual reference to the popular checkered shirt. “He wears a flannel even in the summer.”
flapper
Known for short skirts, bobbed hair, and enjoying jazz music. “My great-grandmother was a flapper in her youth.”
flat out
Used to emphasize speed, effort, or a direct statement. “We were running flat out to catch the bus.”
flex
Popularized through hip-hop culture, it now means any kind of boasting. “He’s always on Instagram flexing his new car.”
flicks
A classic, casual term for cinema. “Want to go to the flicks on Friday night?”
flimsy
Often used to describe a poor excuse or a poorly made object. “His alibi was pretty flimsy.”
flip-flops
In the UK they are just ‘flip-flops’, but in Australia, they are called ‘thongs’. “I live in flip-flops all summer long.”
flip out
Describes an outburst of intense emotion. “My dad will flip out if he sees this mess.”
flog
Often implies selling something quickly or with effort. “I need to flog my old bike to make some cash.”
flop
Commonly used for movies, plays, or products that fail to succeed. “The new superhero movie was a total flop at the box office.”
flub
Often used for misspeaking or making a minor error in a performance. “The actor flubbed his lines during the play.”
fluke
Refers to something that happened by accident, not by skill. “I only won the game by a fluke.”
flummoxed
A slightly more colourful way to say “confused.” “The difficult puzzle left him completely flummoxed.”
flunk
A common term in academic settings. “If I flunk this test, I’ll have to repeat the class.”
flurry
Also a weather term, but used figuratively for commotion. “There was a flurry of activity before the deadline.”
flustered
Describes a state of being unsettled, often from being rushed or stressed. “He got flustered when they asked him an unexpected question.”
fly
Strongly associated with early hip-hop culture. “He looked so fly in his new tracksuit.”
FOMO
An acronym now used as a word to describe social anxiety. “My FOMO is so bad I check my phone constantly.”
foodie
Describes someone who enjoys food as a hobby, not just for sustenance. “My sister is a foodie who loves trying new restaurants.”
fool
A very common, mild insult or term of endearment. “Don’t be a fool, of course I’ll help you.”
footy
A colloquial term for the most popular football code in the area. “Let’s go watch the footy at the pub.”
for real
Used to add emphasis or to question the truth of a statement. “Are you for real? You actually won?”
four-eyes
A schoolyard taunt that is now considered childish and offensive. “The kids used to call him four-eyes.”
foxy
Popular in the 1970s, now sounds quite old-fashioned. “He thought she was a foxy lady.”
fr
A very common texting abbreviation to show agreement or sincerity. “That concert was amazing fr.”
frat
A clipping of “fraternity,” often associated with a specific party culture. “He’s going to a frat party on Saturday.”
freak out
Can mean to panic, become very angry, or get overly excited. “I’m going to freak out if I can’t find my keys.”
freaking
A common, milder substitute for the F-word. “I can’t believe this freaking traffic.”
fresh
A key term in early hip-hop culture, similar to “fly.” “Those are some fresh sneakers you’ve got.”
friend zone
To be “in the friend zone” is to be platonically rejected. “He was sad after she put him in the friend zone.”
frigging
Another common, slightly stronger but still milder substitute for the F-word. “Turn that frigging music down!”
frills
Often used in the phrase “no-frills.” “I bought a no-frills airline ticket to save money.”
fritz
Usually used in the phrase “on the fritz.” “My old television is on the fritz again.”
front
Implies a deceptive or inauthentic act to seem tougher or richer. “He’s not a gangster, he’s just fronting.”
frothy
A playful term for a beer, referring to its foamy head. “Let’s grab a frothy after work.”
FUBAR
Originating in the US military during WWII to describe a hopelessly chaotic situation. “The whole project is completely FUBAR.”
fuddy-duddy
A playful, slightly critical term for someone resistant to new ideas. “My grandpa is such a lovable fuddy-duddy.”
full monty
Popularized by the 1997 film, it can also mean complete nudity. “For my birthday, I want the full monty: cake, presents, and a party.”
funky
Can be a compliment (stylish) or a complaint (smelly). “That’s a funky bassline. Also, this cheese smells funky.”
fuzz
Popular in the 1960s and 70s, now sounds a bit retro. “Quick, hide! It’s the fuzz!”
fuzzy
Used to describe memories, images, or logic that isn’t sharp. “I’m a bit fuzzy on the details from last night.”