1 definition by swamppeople

sex position that is as follows...
the girl is lying off the bed with her shoulders/neck on the ground and torso against the bed, she is required to hold her legs back as far and wide as possible so we can begin. You start by bending ur boner down so that you are able to stand with your legs wide and thrust in a downward motion into her pussy (like a jackhammer). you then increase speed and many will at this point adopt the superman stance. meaning you place a chair 1 to 2 feet beyond her head on the ground and grab the sides so you are parallel to the floor and are able to use your hip thrusters to pound away at the pussy. this develops great lats and abs, while also feeling great on ur downstairs. The Jack hammer
"after amanda thought she was creative with the reverse cowgirl, i decided to throw her off the bed and let the jackhammering begin on her pussy, i have never seen so many o faces at one time"

I jackhammered the shit out of that dime piece from nebraska
by swamppeople June 14, 2011
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