look up any word, like steppin on my dick:
 
2.
Acronym; "Ate the F*** Up"; Can be used to describe a person, place, thing, type of operation/mission or a form of business i.e. unit, corporation etc.

When something/someone is not operating to the ability in which it should. ATFU happens before FUBAR and after SNAFU.
PVT Smith's uniform is ATFU.
by JSP123 October 11, 2008
 
1.
Acronym; "Ate the Fuck Up"; Can be used to describe a person, place, thing, type of operation/mission or a form of business i.e. unit, corporation etc.

When something/someone is not operating to the ability in which it should. ATFU happens before FUBAR and after SNAFU.
PVT Smith's uniform is ATFU.
by JSP123 October 12, 2008
 
3.
abbreviation for "ate the fuck up"..when someone stays up and is retarded, or stuck the next day
he been up all night on that crystal, now that fool atfu!
by summer d. August 08, 2008
 
4.
a random typo for "stfu".
"Princess Leia says ATFU!"
by linds March 24, 2005
 
5.
Short form for Asian The Fuck Up.
<Shears> someone tell someone to ATFU after they say something stupid
<Shears> so i can quote it for Urban Dictionary
<TLR> ATFU, Shears.
by George December 26, 2003
 
6.
ATFP - Ass the fuck up.
Founded by Nick, of the misspelling of the word STFU.
Dude atfp, moron.. u fucking cock sucking mulione.
by Tal-ev Osimao November 07, 2004