A gentleman with a specific wank window, ie his missus has just popped next door for a cup of sugar, A mindless act of violent self abuse carried out in a sort of masturbatory red mist.

It is similar to the shocker but instead of using 2 fingers and a your pinky you use 2 fist.

A sexuall position in which a man with his both hands into a fist and sticks it up a girls anal passege way violently

a time when a girl/guy is so upset with you, they decide that they are going to fist you, but with such intesity that you start to bleed out your ears!! after the fist is inserted, there is some long term damage when the index and middle fingers are extended twirling around moving your rectum line!