goat bash
This is a rather brutal way of getting off...first you have to engage in doggie style sex with a willing participant, then, right before you ejaculate, you bash them in the side as hard as you can as to tighten up all of their muscles for an amazing orgasm...usually followed by getting your ass beat by the participant.
Billy was doin' it doggie style with Sally, and right before he came he goat bashed her and as soon as she recovered she hit him with a pancake griddle.