A person regarded as being disagreeably egotistical and self-assured.
A person regarded as annoyingly self-assertive, especially for making impudent displays of knowledge.
(Slang) Incriminating information or evidence:
A know-it-all person
(Informal, former) A saucy, rude child
(Slang) A wiseacre or wiseguy
Find another word for smarty-pants. In this page you can discover 11 synonyms, antonyms, idiomatic expressions, and related words for smarty-pants, like: wiseacre, wisecracker, witling, smart aleck, wise guy, good, malapert, know-it-all, saucebox, smarty and wisenheimer.