jackass
noun
1. a man who is a stupid incompetent fool
Similar word(s): bozo, cuckoo, fathead, goof, goofball, goose, zany
Definition categories: person, fool, muggins, sap, saphead, tomfool
2. male donkey
Similar word(s): jack
Definition categories: animal
verb
1. (rare) To behave very obnoxiously.