Thesaurus:know-it-all - Wiktionary, the free dictionary

Sense: an obnoxiously clever person and/or a person making obnoxious efforts to seem clever

edit

• Buddha (ironic)
• clever clogs
• clever dick (UK, pejorative)
• know-all (chiefly UK & Ireland, pejorative)
• know-it-all (chielfy US, pejorative)
• smart aleck (pejorative)
• smart ass (pejorative)
• smarty (pejorative)
• smarty pants (pejorative)
• wiseacre (pejorative)
• wiseass (pejorative)
• wise-ass (pejorative)
• wisenheimer (chiefly US, pejorative)

• intelligent person    [⇒ thesaurus]
• jerk    [⇒ thesaurus]

• intelligent person    [⇒ thesaurus]
• wise person

• know-it-allery