During sex in the missionary position you put your fingers in the females mouth and clasp the jaw.
You then use this purchase as a holding point to pound away at your
lucky partner.
Can also be
done while going at it doggy style. Making it the "Rear Mandible
Pound"
Guy 1: So you get
lucky with that girl last night.
Guy 2: Man, she was a filthy bitch. Made me mandible
pound her. Then said she liked to be choked out.
Guy 1:
Sweet.
Guy 2: Yeah. So then I switched to the Rear Mandible Pound for more leverage.