when a lady is giving u head but doesn't want you to cum in her mouth. You cum in your hand and slap her in the face and say "All OK jumpmaster"
Noodles and Smeduim were getting head, and pulled off the jump master. But Giggles got it from a dude!
by thobobtim February 22, 2008
1 more definition
the dude who looks after you when you're learning to skydive
that twat of a jumpmaster pushed me out of the plane
by Mat D April 22, 2005