When an individual gets a cramp in one arm from excessive masturbation.

A robber who only robs whites

Any minority, normally black people, who “jack” or steal purely or most enjoyably from white people.

A person who steals all your hardwork and claims all the credit aka boss aka coworker aka bastard

An overly competitive alpha-male who refuses to accept defeat; or when defeated, is a total bitch about it, see also veenus master.

One (male) who in conversation with a fellow, workmate etc is inclined to grab the other guy's crotch suddenly and without warning. The object is ostensibly to put the victim ill at ease and in a state of embarrassment. However, one wonders if it's simply an excuse to grab other mens' genitals.

When some doosh (usually named Blake) jacks a beat (electronic focused dance music) that has been discovered by you.