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An expression of congratulations or praise directed at a female.

Comes from the expression "that's a good girl" which became "that a girl" and finally "attagirl."
"Attagirl! I knew you could do it."
by Brittbrat October 21, 2007
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A phrase used to congratulate someone on an accomplishment, a phrase commonly used by old men
sarah: Yes! I got my drivers license!
grandpa: Atta girl! I knew you could do it!
by hi7777777 February 17, 2010
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a girl that is awesome, meaning "that-a-girl" or "what-a-girl", also see shiznit.
Paula is such an attagirl.
by Paula M. October 20, 2005
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the name of an indie-rock band from Toronto, Canada
ATTAGIRL makes my heart love.
by Edward K. March 25, 2013
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When you watch porn and the chick is taking it in every orifice to the elbows and loving it.
β€œHis whole arm is in her ass!” β€œAtta girl!”
via giphy
by Tacosdorados July 01, 2019
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