The act of peeing without unzipping or unbuttoning your pants. Although this method of peeing this does save time the act itself is very dangerous. It is more than likely that you will pee on either your pants, shirt, or hand.
Guy #1: Dude, I have to take a piss.
Guy #2: The bus is almost here though.
Guy #1: Looks like I have no choice but the Lazy Man's Piss.
Guy #2: May god help you.