To hurl something, usually a heavy object, at someone's face
Hannah: That person annoys me.
Craig: You should yivid a rock at their head!
When a poo is hanging out of your bottom
Bronwen: What's a word that rhymes with circus?
Hannah: Percus
Having a stomach upset so bad your chump comes out at high speed.
Barry's atomic chump was so violent he destroyed a small village.