Very bad: walked out of a really wack movie. (adjective)
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 "wack" in a sentence
"Now this nut wack is out there telling her few supporters to not use "her" tactics when trying to have a health care dicussion."
"People who believe that "McCain wack-America need change, Obama be dat" is a moving and deep political slogan."
"All ya'll is fuckin wack he was one of the greatest rappers alive ya'll better respect him cuz without him hip-hop wouldn't even have exsisted so step brandon guerilla black shoulda played biggie and the cast does look pretty weak"