When you are so sick that your poo comes out like piss.
I was drinking water and it was going right through me! It was arse piss.
To move from ones current position. To budge.
Used to implore someone to move - "Will you please budge over." reply "I'm budging over aren't I?"
Also used in a negative - "This screw is rusted solid it won't budge." reply "That's going to take some budging."