—used to express encouragement, approval, or admiration to a woman or girl
They also wore ponytails out the backs of their hats and shouted "Attagirl!" every time a fielder made a nice stop in the dirt. Brian MacPherson, Arizona Republic, 20 June 2006
: an expression of encouragement, approval, or admiration given to a woman or girl
I've had plenty of friends tell me they read these weekly updates and offer encouragement. I've also had lots of readers I don't know send attagirls or dieting suggestions by e-mail. Susan Pierce, Chattanooga (Tennessee) Times Free Press, 13 May 2010