When ones ball sack is stretched out like a trampoline while bouncing the mouse aka penis up and down off the trampoline
by Butterfly85 January 10, 2018
The act of stretching one's scrotal skin and bouncing the penis repeatedly on it for a large audience, preferably unsuspecting churchgoers...or an elementary school.
The sermon was interrupted when a man stood and entertained the congregation for hours with his mouse on a trampoline.
by Hi-Definition July 12, 2009
stretching one's scrotum forward and shaking it up and down so that the tip of the penis bounces on it
by madfunfrank September 30, 2013