The act of hitting someone so hard in the head with your rock hard cock that it ends up penetrating their frontal lobe.
Person 1: Did you hear about that guy with the huge cock that went around skullfucking people?
Person 2: I heard he was a little bit of a dick.
Person 2: I heard he was a little bit of a dick.
by TearsOnlyMakeTheSaladFresher January 18, 2016