Adjective. To describe an object, person or idea as "pissy" means it is golden, hot and fresh. Used in slang typically to describe music, outfits, objects of value or rides, but an exceptional person could be described as pissy as well.
Sully: Hey, man, that new gold chain you got is fresh and drippy!
Javon: Thanks, broski, my homie at the jewellery shop called it mad pissy!