A Hooter McGavin is when a male is preforming vaginal/anal sex on a female and befor climaxing pulls out his penis and points it toward the breats of the femal, ejaculates on the females breats while hand motioning a gun shoot simular to shooter mcgavin from the move happy gilmore. Also male can , at the time of ejaculation can yell "hoot hoot".

A casual invitation / threat used by an individual that is not afraid of fucking someone up.