(Slang) A wiseacre or wiseguy
A person regarded as annoyingly self-assertive, especially for making impudent displays of knowledge.
A know-it-all person
(Informal, former) A saucy, rude child
A smart aleck.
(Slang) Incriminating information or evidence:
Find another word for wiseacre. In this page you can discover 12 synonyms, antonyms, idiomatic expressions, and related words for wiseacre, like: malapert, wisenheimer, smart aleck, know-it-all, wise guy, witling, saucebox, smarty, smarty-pants, wisecracker and good.