a male donkey.
a contemptibly foolish or stupid person; dolt; blockhead; ass.

Origin of jackass

First recorded in 1720–30; jack1 + ass1
Related formsjack·ass·er·y, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for jackass

Contemporary Examples of jackass

Historical Examples of jackass

British Dictionary definitions for jackass



a male donkey
a stupid person; fool
laughing jackass another name for kookaburra

Word Origin for jackass

C18: from jack 1 (male) + ass 1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for jackass

mule ass, 1727, from jack (n.) + ass (n.1). Meaning "stupid person" is attested from 1823.

Online Etymology Dictionary, © 2010 Douglas Harper