attaboy

(redirected from that's the boy)

attaboy

An expression of encouragement, support, or approval toward a boy, man, or male animal, used as a standalone interjection before or after a sentence. Largely presumed to be a corruption of the expression "that's the boy"; it is also sometimes spelled "atta boy." You won the spelling bee? Attaboy!
References in classic literature ?
That's the boy, see him kick, he hits out with his fists like a good one.