also smartass, 1960 (adj.), 1962 (n.), from smart (adj.) + ass (n.2).
Slang definitions & phrases for smart-ass
smart-ass
adjective
: That's a smart-ass question
noun
A person who is quick to offer an often-abrasive opinion or comment from a posture of superior intelligence and learning; bigmouth, know-it-all, wise guy: You're a real wiseass sometimes, Mary Anne(1960+)