Short for “butt hurt”. This short-hand is used to indicate that someone did something silly, vulnerable, or embarrassing and now they are feeling sheepish.
Ohhh, Sally is butt.
They left without me? I’m butt.
Butt or butty is a way to call a friend in South Wales. It is a superior word to mate so I advise that you stop calling your buttys “mate” and start using butt/butty. To use this word effectively you have to apply a Welsh accent.
Person 1 : oh, you alright butty? I didn’t expect to see you here!
Person 2 : Yeah, I’m fine butty!