An act of cleaning, with unreasonable amounts of effort and pain involved; a method for scrubbing a long, flat surface, while running face first, supported by your hands, holding a towel or "scruzzbrush"; a 'game'; a form of punishment typical (and feared) in Marine Corps basic training.
So we wanna play games? That's fine. SCUZZ! SCUZZ!
"Harder, faster, aye sir!"
NO REALLY, SCUZZ!