Definition of tight-ass
chiefly US slang
: a rigidly straitlaced, conventional, or inhibited person
- As Indiana warmed up, Wilkerson noticed Bo Ellis, Marquette's star forward, pointing to the Hoosiers' retro warmups and laughing. Clearly, this game matched the cool dudes from Milwaukee against the tight-asses from Bloomington.
- —Jack McCallum
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tight-assed
play \ˈtīt-ˌast\ adjective-
- Like the schoolteachers who had tormented their childhoods, earnest and tight-assed, humorless and self-righteous.
- —Robert Stone
