Definitions

1. noun

a person who is considered to be a connoisseur of buttocks, often in a humorous or ironic sense, typically due to their appreciation for buttocks in a visual or artistic context

“He’s such a buttman, always looking at paintings of nude models.”

2. proper noun

a nickname for Bob Clampett’s cartoon character, a stereotypical Frenchman with a large bottom.

“The Looney Tunes episode featuring the character Buttman was a classic of the genre.”