An adolescent or fraternity type prank where one yanks the arm of a man while he is urinating, thus causing him to let go of his penis and urinate in or on his pants. The arm holding the penis represents the tea pot handle. The penis represents the tea pot spout.
Chris gave Pete a Tea Pot after they had been drinking light beer all day. Pete's waistband snapped back and his dick went all the way back in his pants and he pissed in his pants for at least 2 seconds.