A fart, from the slang term number 2 as in shit, deuce=2 air=gas
i just dropped an air deuce
Climbing up natural (ex: up in a tree) or man-made structures (ex: off a bridge) to defecate from an un-natural distance above the ground.
The higher the drop, the better.
Did you see that air deuce Eric dropped off of that bridge? He must have dropped it 30 ft!