hand-shuttle
The act of masturbation by moving your hand up and down the penis emulating the launching of a shuttle craft over and over again.
"Billy, what were you doing in the bathroom so long!"
"I was launching the hand-shuttle mom!"
"I was launching the hand-shuttle mom!"
Launching the Hand Shuttle
The act of masturbation. (male)
Get out of the freakin' bathroom! What are you doing in there, Launching the Hand Shuttle?