A fan of "Jack Johnson"

Often seen wearing birks or sandals while chillin' in the quad with his backward-baseball-cap-wearing "BROS"

to do nothing productive -- to waste time -- shoot the shit poop around dick around

when a male cannot find a girl to have sex with so he is forced to pleasure himself.

A spin off of the Jackass Mtv show.
(aka a jackass spinoff is a jack off)

to use your hand or an instrument to stimulate the male genitalia, ultimately resulting in an orgasm.