tight-ass

noun

ˈtīt-ˌas 

chiefly US slang

: a rigidly straitlaced, conventional, or inhibited person

Stop acting like a saint. You drink with me all the time, and plus, my parents won't be back in town until tomorrow. I don't know why you're being such a tight-ass today, but stop.

—Katie Zhao

tight-assed

ˈtīt-ˌast 

adjective

Like the schoolteachers who had tormented their childhoods, earnest and tight-assed, humorless and self-righteous.

—Robert Stone

Word History

First Known Use

1971, in the meaning defined above

Rhymes for tight-ass

• alas
• amass
• bromegrass
• bypass
• chagas
• crabgrass
• crevasse
• eelgrass
• eyeglass
• groundmass
• harass
• impasse