A foolish or stupid person; a blockhead: "You've acted like an irrational jackass and it's time you stopped” ( Margaret Truman). (noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "jackass" in a sentence
"Note to editor: If I can't say the word 'jackass' substitute the word 'jerk', but I really do mean 'jackass'."
"There's no more use of the word "jackass," which created a mild controversy over the original."
"I was just watching the new Hancock trailer again and I noticed that "jackass" is used twice in that trailer alone."