a piece of piss
Someone who’s barely better than a piece of shit, they just don’t know how to be a waste of life properly. They’re like that guy who shows up to your party and only brings one bag of chips.
Kyle is a piece of piss, he works at a fast food place just to fund his meth habit.
Gus is a piece of piss, he only helps you if he’s getting a free soda.
Clem is a piece of piss, he shows up to work high and eats all the donuts.