Stand naked in the corner of a room with arms extended like the hands of a clock while rocking hips side to side to slap one's balls against his thigh rhythmically with every second
Uncle Lester got drunk again on Thanksgiving and did the grandfather cock in the corner of the living room for hours until my mom finally called the police
When you're trying to shop for some antique grandfather clocks for your paps but then you unfortunately forget the "l" in "grandfather clock" and now you wish you were dead.
sex move used by a male to pleasure two females at the same time. have the two females face away from you, one in the front and one in the back. place a strap on dildo backwards so that it is facing the girl behind you and also erect the penis towards the front girl. then rock from back to forward once every second.