Short-stalling is the absence of bathroom etiquette wherein someone, when given a choice of bathroom stalls, sits in the stall next to someone already using one when they had the option of choosing another stall and leaving a "buffer zone" between them and the other stall occupant.
Bob short-stalled me again after lunch today - four stalls available and he sits right next to me!
David is a one shot sally. Damn this one gun in MW3 that only reloads once in a lifetime but kills a butt load of kids in one shot is a one shot sally.