Of poor quality; uncool. Early hip hop term, from "Rapper's Delight" by the Sugarhill Gang.
"I got bodyguards, I got two big cars
that definitely aint the wack"
by Black-Velvet November 18, 2008
Get the The wack mug.
The term "Wack" is a word used to describe any "musical" "artist" who is enough of a sell out to feature on national television.
An example of a wack artist would be:

Every artist you know and listen to.
by The1PersonWhoIsSmarterThanYou January 14, 2011
Get the Wack mug.
A gross misspelling of whack used by complete idiots
"Crack is wack"
"Did you mean Crack is Whack"
"Oh yeah you right"
by SpankyMcgee October 24, 2018
Get the Wack mug.
Being\ doing something so outrageous is considered Wack. It is also now embodied by a gif see image below:
Mr africa is so Wack. he doesn't like stoney.
by @Blackness_DBCily March 25, 2018
Get the Wack. mug.
1. Something is quite cool, or quite interesting. Often associated with a negative quality, it has seen a surge with more positive association.
Teacher: And thus, a^2 + b^2 is c^2. Everyone understand?
Student: wack. I get it.
by AVeryWittyName March 11, 2019
Get the Wack mug.
1.) wackjob-fuckd up
2.) wack crazy wierd screwed up
by Anonymous August 27, 2003
Get the Wack mug.