good boy

English

good boy (plural good boys)

An obedient male child, or someone who behaves like one, even when deemed inappropriate.
Oh you're such a good boy, not reporting the crime because you didn't want to hurt anyone.
- 2011 June 26, “Linguistically correct”, in The Guardian‎^[1]:
  English is scandalously lacking in politically and linguistically correct antonyms of this sort. The Queen can create the Duchess of Cambridge, so surely I can create the much-needed expressions "cisgress" (be a good boy), "cisvestite" (bloke wearing trousers), "cisaction" (no deal), and "cisom" (something that isn't a lintel). Anyone who doesn't disagree is a transsy.

(idiomatic) Well done, to a male.
Said as praise to an obedient male dog or other male domesticated animal; see also who's a good boy.
"Fetch! Fetch!" (dog fetches stick) "Good boy!"