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