When a man who looks like their name is Jack. Just goes off on someone when they are really mad. And puts their hand into a fist and starts shaking it with rage.
Another term for the verb everyone knows and loves. Jacking off is a favored past time for numerous men and women alike that consists of slow or violent rubbing on the genital parts. This is often accompanied by various forms of stimuli such as pornography and/or sex toys.
It is important to take note that Jacking off is when the action is happening.
Male Adult: I was jacking off to some BDSM the other night.
Female Adult: That video made wet so I started jacking off.
Another adult: Man John is always horny he can never keep his Dick in his pants so guess what he did in the bathroom? I heard him jacking off.