A way to describe a
sexual partner that, during the act of coitus or anal, the penis is inserted into the orifice with more force than is normally applied, usually someone who does this
frequently. This usually refers to the one inserting the penis, but this can be applied to the one who is getting the penis inserted into themselves should they mount it with extra force.
Derived from
punching the monkey, since this is the name of the act itself.