A know-it-all person
(Informal, former) A saucy, rude child
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 wisenheimer. In this page you can discover 12 synonyms, antonyms, idiomatic expressions, and related words for wisenheimer, like: malapert, witling, know-it-all, saucebox, smart aleck, smarty, smarty-pants, wiseacre, wisecracker, wise guy and good.