- The definition of a jackass is a person who is stupid, foolish or offensive, or a male donkey.
An idiot guy who shouts heckles at a wedding and who generally makes a fool of himself wherever he goes is an example of a jackass.
A jackass, ass, or donkey.
- a male donkey
- a stupid or foolish person; nitwit
Origin of jackassjack- + ass
- A male ass or donkey.
- A foolish or stupid person; a blockhead.
(third-person singular simple present jackasses, present participle jackassing, simple past and past participle jackassed)
- (rare) To behave very obnoxiously.