jackass

noun

1. (countable)A male donkey.
2. (US, countable)A foolish or stupid person.
3. (US, countable)An inappropriately rude or obnoxious person.

   “Bobby, only jackasses go around saying how much money they make.”

4. (US, slang, uncountable)A kind of bootleg liquor.

   “As the vintner Louis Foppiano recalled years later, Sonoma County during Prohibition became a center for bootlegging, not of wine, but of spirits. 'There were some big stills hidden up in the hills of Sonoma, some producing five hundred gallons of Jackass [spirits made from spring water and sugar] a day.'”

   “By now the wine counties were rife with the activity of the illegal wine trade and the force of the Prohibition Unit was hustling to keep up. At the start of the year, Officer William Navas had staged a raid on the dining room at Healdsburg's Hotel Sotoyome and discovered 'jackass' brandy […]”

5. (Australia, countable, obsolete)The laughing kookaburra.
6. (slang)A jack and an ace as a starting hand in Texas hold 'em.

verb

1. (intransitive, rare)To behave very obnoxiously.