know-it-all
/ˈnəʉ.ɪt.oːl/ noun
Also a form of know-all
Forms know-it-alls know-all
- noun (chiefly US, derogatory) Someone who claims to be knowledgeable or an expert in something, obnoxiously dismissing the opinions, advice, suggestions, etc. of others. “We had it all figured out, but this know-it-all marched in with "the correct way of solving it", leaving our experiment in shambles.”
Synonyms
Buddha clever clogs clever dick know-all smart aleck smart ass smarty smarty pants wiseacre wiseass wise-ass wisenheimer
Antonyms
Etymology
From know + it + all.
Sources: Wiktionary — from the Wiktionary entry “know-it-all”, CC BY-SA 4.0. Details