Definition from Wiktionary, the free dictionary
Variant pronunciation of "That's the boy!", a cry of encouragement, especially to children and pet dogs.
- (idiomatic, colloquial) Used to show encouragement or approval to a boy, man, or male animal.
- Attaboy! That's the way to hit a home run!
Used to show encouragement or approval to a boy or man
attaboy (plural attaboys)
- A cry of "attaboy"; an accolade.
2007 June 30, David M. Halbfinger, “How a Fan of Comic Books Transformed Himself Into a Hollywood Player”, New York Times:
- LOS ANGELES, June 29 — Drink in hand, attaboys coming at him from every direction, Tom DeSanto was living the fanboy dream.