To be raped in the ass by nine STD infested prison guards --- all at the same time.
Jesse got USaGa'd, and Coal laughed at him for a very long time.
To get ripped off or gypped in some way. Usually refers to the price of something dropping sharply right after you buy it, or something that lands far below your expectations. Can also mean owned.
I heard Josh bought his Playstation 2 a week before the $100 price drop, man he got USaGa'd!