A multi pleasure activity where a man recieves a rim-job while taking a piss.
1: Man, I was just taking a piss when this girl stuck her tongue up my arse.
2: Was it good?
1: It was damn good.
2: Reverse blumpty man, that's what I'm talking about.
Bempty, describing how your social battery is empty, is composed of b (short for battery, referring to the social battery), and empty, referring to how it's empty.