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
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