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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.
by JSP123 October 11, 2008
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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
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Anonymous hacker group by the name of All Trolls For U.
They leak Pedos IP adress and all raid/troll chats on the Amino app.
Bro have you seen what ATFU did yesterday?
no
Dude they leaked 5 pedos ip's...
by atfu_xoiv November 16, 2018
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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
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<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
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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
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