roof piss Share definition Flag u kno wen u fuked up on a rooftop and u really gotta go? ya man dats roof piss™® "bros, this beer is going right through me... should i make the painstaking effort to find a bathroom or just go up here??? brb roof piss" roof piss by trill_ninja January 24, 2010 0 0 Get merch Get the roof piss mug. Buy Now — $32.95 See more merch