When someone gets way too high, and freaks out slightly. Symptoms include paleness, sweating, loss of the ability to open your eyes, and a desperate desire to no longer be high.
Josh: Dude, is Sam ok?
Joey: He is Wack Attacking.
Josh: Oh... Shall we fuck with him?
"Fuck... I'm ok... I'm ok... Its just a Wack Attack."
An unstoppable urge to play with your penis, it can be brought on by seeing pretty girls on the street, seeing a hottie on tv or remembering a great scene from a porno...etc.