When you sit on your hand until it goes numb, then you proceed to masturbate so it feels like you are being jerked off by a ghost, or invisible spectral force.
"Man, I was getting so bored of normal wanking I tried ghosturbating... it felt great!"
by Long Tao October 18, 2007
1 more definition
During Halloween you dress as ghost and get on all fours, you start masterbating while someone sticks a gourd in your ass.
I went to a halloween party and started ghosturbating infront of everyone.
by slap chop December 17, 2010