This occurs when you are jerking off. When you are about to cum, move your hand infront of your tip in the high five position, then shoot your cum shot at your hand, creating a handshake between your cum and hand.
Last night I used the semenShake technique, and it was magical.
Ruler of Lake Titicaca. Rumored to have a bunghole that gets very angry if it does not receive toilet paper. Cornholio the Great is often seen walking around with his shirt over his head and his hands in the air, chanting songs about his power, and his bunghole.
"I am Cornholio! You do not want to face the wrath of my bunghole, for I need TP!"
Butthead: Shut up, Beavis! (uh huh huh huh)
Beavis: Um, okay. (heh heh heh heh).