Cartman: I would never kill somebody. Unless they pissed me off.
Grampa: Oh, is that a fact? Well, let me tell ya something, Porky. Your mom was over here earlier, and I humped her like a little bitch!
Cartman [shocked]: What?
Grampa: That's right!
Grampa: And then, I dug up your great-grandma's skeleton, and had my way with her too.
Grampa: Choice piece of it, your great-grandma.
Cartman: You piece of crap! I'll kill you!
Grampa: That's the spirit, Tubby!