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FYI is an acronym for "For your information." So, instead of writing "For your information" you would simply write "FYI" to get your point across. (Hence, an acronym)

An e-mail may be forwarded and in the content you can write "FYI" and the reader should then scroll down to read the remainder of the e-mail.

Can be mistaken for "For your FYI" - this is misuse of acronym.
Proper use: "The can of corn is in the top shelf, FYI."

Misuse: "For Your FYI it is our boss's birthday today" - wrong.
FYI by Giggles124 January 31, 2014
Related Words
FYI • fyif • FYIAD • fyidc • FYIGMO • FYIM • FYIMTDT • Fyita • FYITTA • fyiwdwytm
The acronym fyi stands for "for your information".

Its use is to inform someone about anything and placing the acronym as a starter to a sentence or to end it.

e.g. Fyi, I'm not gonna make it tonight, sorry.

Hey, fyi, I don't want to watch this movie.

I don't think that we're gonna be there on time, fyi.

The use of it is not strict and you can form variations on how fyi will be used in a sentence. As long as its meaning doesn't change.
Examples on how fyi is used are shown above.
fyi by Bezakos March 7, 2022
Something idiots say because they're too lazy to spell 'for your information'.
A random girl online: Ha, losers! I just got a bf!
Me: You're probably a ten-year-old who just wishes she had one
A random girl online: Uh, fyi, I DO have a boyfriend!

Me: D-Did you just say... 'fyi'
A random girl online: Ugh, yes!
Me: 10-year-old confirmed
fyi by sansdeskelebro March 10, 2017
It's quite simple actually. It was originally a shortened version for For Your Information.

However, people have made up other things that can stand for FYI. For example "Fuck You Idiot". But, that's a bit pointless if you ask me. Saying the whole thing has a grander effect.
(Quoting Shrek 2)

Prince Charming: FYI, not my fault!

Or..

-FYI!!!
-Huh?
-Fuck you idiot!!!
-What the hell?
FYI by HerculePoirot August 27, 2004
FYI means For Your Information... i dunno WTH u ppl are on about; sayin it means Fuck You Idiot... and that crap...it's been on TV, on kid's programmes...on the Simpsons...
Homer Simpson- " FYI- while you two were arguing i ate your breakfasts."
Lisa & Bart together- "D'oh!"
FYI by Adam. J. O. September 8, 2007
person1: 'The sky is green'

person2: 'FYI (For Your Information) its blue'

person1: 'The sky is green'

person2: 'FYI (Fuck You Idiot), its blue'
FYI by FYIMASTER July 12, 2010
More from Urban Dictionary

Plate of Brown 

A plate of brown consists of foods that have little to no nutritional value, and are typically deep fried. A true plate of brown will also be accompanied by a dark soda.
Wanna go to meal hall & grab a plate of brown?
Plate of Brown by Cheddar Craigson September 18, 2020
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Larpenomics

When finance content creators rent out fancy cars and flex cash to seem richer than they really are in order to promote and sell their “get rich quick” courses.
Andrew Tate has mastered the field of larpenomics
Larpenomics by Rbois09 October 21, 2026
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Palmela Handerson 

Your hand that you masturbate with.
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Boyfriend: Have a visit from Palmela Handerson of course!
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x:"Girl your fit chewed today!"
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Blue Movie 

A pornographic film.

The use of the word "blue" to refer to sexually explicit content was first recorded in Scotland in 1824. "Blue" meant "lewd" because prostitutes dressed in blue gowns.
I found your stash of blue movies under your bed.
Blue Movie by Shayde79 January 20, 2011
Word of the Day on October 18, 2026

fache-couture 

French slang, which translated, means "bull's fashion" but basically equates to "hyper trendy" or overly trendy. Used when a person wishes to express distaste at the latest fashion trend/fad, because it seems that everyone has a certain item of clothing or is wearing it. This term is most frequently heard in Paris but is slowly spreading to other parts of France.
1. That Burberry scarf is so fache-couture.
2. That purple American Apparel hoodie is so fache-couture.
fache-couture by bkgmh46x0x March 18, 2008
Word of the Day on October 17, 2026
A slang term for GLP-1 medications(like Ozempic, Wegovy, Mounjaro, etc.), usually referring to their appetite-killing, weight-loss, or “I forgot to eat” effects rather than the medical details.

Usage:
* Often casual, ironic, or meme-y
* Can imply effortless weight loss, suppressed hunger, or being “powered by pharmaceuticals”

Notes:
Not a brand name—just shorthand for the whole GLP-1 wave. Frequently shows up in online jokes, gym talk, and group chats where people pretend they’re *totally* doing it naturally.
“I’m not dieting, I’m just on that glippy.”
“Ever since the glippy hit, food feels optional.”
“That summer body? Yeah, glippy assisted.”
Glippy by Wild Stoner Appears December 14, 2025
Word of the Day on October 16, 2026
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