jackass /ˈd͡ʒækæs/noun 6verb 1forms 3 noun6 •A male donkey. •(US) A foolish or stupid person. •(US) An inappropriately rude or obnoxious person.Bobby, only jackasses go around saying how much money they make. — 2004 •(slang) A jack and an ace as a starting hand in Texas hold 'em. •(US, slang) A kind of bootleg liquor. •(Australia, no longer used) The laughing kookaburra. verb1 •(rare) To behave very obnoxiously. formsjackassed · jackassing · jackasses