It is a football term used to describe how you get into a crouched position hovering over a toilet bowl. This is due to a disgust for sitting on toilet seats. Be sure to put the seat up first with your foot.
I entered the shitter and discovered there were no paper seat covers. It don't matter cuz I get in my 3/4 Stance to fire off Scuds!
an extremely wide stance while taking a shit - where the feet are placed in the next stall; an impossible toilet stance if the pants are around the ankles; clever excuse by Senator Larry Craig to deflect attention from more probing matters
What the hell are you doing tapping my foot, you pervert? Nah, man, I just got a widebathroom stance.