1. a male that uses a stall to pee, even if a urenal is open
2. a self-concious male that hides from people in restrooms
3. a male that will actually use a handicapped stall, when other stalls are open
Steve, there's a urenal right here; don't be a stall waster dude.
The stall waster heard steps, and ran to the closes stall to hide.
The man in the wheel chair crapped in his pants because a stall waster wouldn't come out.