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The Fail Caterpillar 

A mischevious, fuzzy little caterpillar that says the word Fail. It's videos can be seen on the site youtube.com/dyli.
Fail.

Hey, don't be the fail caterpillar!
The Fail Caterpillar by Dyli June 15, 2010

for the fail 

just like ftl, but much cooler and with much more style.
Player 1: OMFG DUDEE!!11one1@!! A FUCKING BR JUST KILLED ME!!1! A BR!!!
Player 2: for the fail.
for the fail by Canox June 12, 2007

what the fail

when witnessing a failure in which you are confused as to how the failure happened or came to be.
colleen: OMG Brian did you just see what happened to that guy.
Brian: NO! OMG what the fail!?
what the fail by bricol7000 November 2, 2008

What the Fail

A way of saying what the fuck or wtf and the same time as expressing your feelings about the event in question being a fail.
Guy 1: Did you hear about Justin Bieber not knowing what German was?
Guy 2: The language?
Guy 1: Yeah man.
Guy 2: Dude, what the fail?!
What the Fail by bird875 May 7, 2010

Fail to the faillionth power 

A fail so epic it must be expressed in exponential terms. In this context, faillionth is not directly related to units of fail (failions), but is rather a very large fictitious number (e.g., bazillion, fafillion).
Man, did you actually make it to the end of GI JOE: The Rise of Cobra? The plot made absolutely no sense, the special effects sucked ass, and neither one of the hot chicks got naked the whole time. Fail to the faillionth power!

Did you see that Obama got awarded the Nobel Peace Prize? The Norwegians think they can influence global geopolitics by giving Obama their meaningless award, when reality is that nobody gives a damn about what Norway thinks because their economy is smaller than Hong Kong's and they spend less on their military than does Mali. Fail to the faillionth power!

What the Fail?! 

Think what the fuck.
Think fail.

Throw them together, and what do you get?
WHAT THE FAIL?!
1) Upon seeing Berry's post of "I hove you", Harrie quickly exclaimed "What the fail!?"

2) Person 1- I just slipped and fell out of the shower, tripped over a mirror and decapitated my dog!
Person 2- WHAT THE FAIL?!
What the Fail?! by Caek. December 15, 2009
More from Urban Dictionary

Pee Calculus

When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.
Pee Calculus by anorlondo October 1, 2026
Word of the Day on October 2, 2026
Literally "dirty" pronounced with a West Indian accent. Can also have a positive connotation, for example Sean Paul's album title "Dutty Rock".
"The girl is pretty but she corrupt and dutty!"

or, in a positive usage:

"Booya! That freestyle was dutty!"
Dutty by J Hall April 3, 2003
Word of the Day on October 1, 2026
korean word for madam, older woman
Ajumma wait a moment
Ajumma by aintnotinbutnice July 5, 2009
Word of the Day on September 30, 2026

Slop Grenade

When someone uses AI to generate a large document, slide deck, or piece of code/software and tosses it over the fence for you to deal with.
Chad: Hey Brent I sent you the new backend API change to review, it’s only 100 files changed.

Brent: he just tossed me a slop grenade
Slop Grenade by Joe Squid September 28, 2026
Word of the Day on September 29, 2026
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).
After we broke up, he was floxi to me.
floxi by Dr. Geek May 13, 2009
Word of the Day on September 28, 2026
NYC people who migrate north to Quahog, RI to see the leaves in the fall.
New York and everyone from there can fornicate themselves with an iron stick.
leafers by ss++ February 8, 2005
Word of the Day on September 27, 2026
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