Home › Words › L › lackwitlackwitlackwit means foolish; idiotic or simple-minded.EtymologyFrom lack + wit.adjFoolish; idiotic or simple-minded.nounA witless person; a fool.e.g.“Fear flashed through Tom's eyes as the lackwit looked to the housekeeper.” — 1996, Denise Domning, A Love for All Seasons, page 82:Definitions & examples from Wiktionary (CC BY-SA 3.0).