A certain posture one undertakes when trying to visualize one's anal region in a wall mounted mirror. One arm outstretched for balance, the other spreading one butt cheek from behind, with one leg drawn up slightly to facilitate said exposure of the anus.
This posture is disturbingly similar to the football players pose on the famous american football Heisman Trophy.
Made famous on the KLBJ-FM Dudley and Bob show. They deserve all the credit. Austin, TX
I was trying to check out my 'roids in the mirror and my girlfriend caught me doing the Dirty Heisman.