If your face is down and your butt is up, then you're lying down on your face.
a forum is up ur butt and to the left
you have messed up poo
It only hurts because you've been sitting on it too long.
you have a nice butt / bigg butt . or maybe his trying to bag it up
her butt
It is a childish insult inviting you to do that action.
Lack of respect? Horseplay? Depends on the circumstances.
Roughly translated it means "my hand is up my butt."
Your butt hurts.
What the hell! what do you mean wheres my psp charger wheres yours up your butt!
you keep slapping it vicously in your sleep, you ok man?