Constipated Bum

Listen up, numbskull! So, a bum is constipated, right? That means it can't poop. Then it tells the other bum, "Piss don't s**t on me!" because it doesn't want to be covered in the other bum's poo! Get it? I'm not surprised you didn't. You probably think the Earth is flat and vaccines cause autism, you troglodyte!