a know-it-all

an offensive term for an arrogant person who professes to know everything in 1 and only one subject but in reality they know absolutely nothing in that subject.

Synonyms for a know-it-all

On this page, you will find 30 slang terms related to a know-it-all. Some of the top words include: ass munch, fuckfish, shaaa, Asspunk, Muppet, and 25 more.