To masturbate, aka to jack off, jerk off, burp the worm
Will Jack jack the slack tonight?
The action of “jacking it” (beating the absolute fuck out of your dick) and then “slacking it “ (lying around and not doing anything
Me: When I get home I finna jack it and slack it
Random nigga: vro same that’s like all I’ve been doing lately
Me: wait who tf are you