1] Something stupid.
2] Something that isn't interesting.
3] Something that is uncool.
2] "I think that show is wack."
3] "Tell your brother that he is too wack to get in this ride"
2) To Jerk off
Tracy: I'm all that and a bag of chips!..and then some!
Rob: Shut yo wack ass up!.. and gets off my Grill.
Tracy: What did u do last night?
Rob: I was wacking my dick ...RAW... thinking about you.