A congratulation for doing something beasty or awesome.
"dude! I just banged Megan fox!"
"atta baby!"
by One eyed midget February 23, 2011
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A phrase used to indicate respect for impressive or otherwise noteworthy actions. These actions can be either positive or negative, but ultimately deserve the sort of reverence that only this term can convey. Often used between bros, this phrase is thought to have originated in Boston, but has since grown, and has been known to pop up in places as far-flung as Montreal and Vancouver.
Man: (Throws up on girl he is hooking up with)
Bartender: "Atta babe"
by crazy native December 29, 2011
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One of the motherfuckers who crashed American Airlines Flight 11 into the World Trade Center 1 during the 9/11 attacks in 2001.
guy 1: remember Mohamed Atta?
guy 2: didn't he crash a plane into the WTC?
guy 1: yeah he died
guy 2: what an asshole
guy 1: ikr
by 9/11 mf October 4, 2021
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When a guy has sex with a mom and a daughter (not at the the same time or within 24 hours).
Tom: I fucked Megan last night and fucked her mom last week.

Dave: Atta boy!
by Harvard_13 July 1, 2023
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1. Can be used as a reference for the person your talking to.

2. a statement of disbelief.
1. John: Bro, I was dragging with pigs last night.
Eric: Atta bay, you must have been dreaming bro, cause I
was with you most of the night.

2. Eric: Yo man, caught this huge fish man.
John: Atta bay, your all plarque.
by K.D. Simpson August 16, 2007
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Words to congratulate anyone for a plausible action.
When John made a good meme I congratulated him with a formal "Atta Nigger john!"
by JDfromcompton October 20, 2016
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When you watch porn and the chick is taking it in every orifice to the elbows and loving it.
“His whole arm is in her ass!” “Atta girl!”
by Tacosdorados July 2, 2019
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