Falling out of my arse

Similar to "hanging out of my arse" but usually referencing tireness and fatigue instead of a hangover or a sense of feeling ill.

Steve: you gaming tonight?
Mickie luv: nah pal, I'm falling out of my arse, gonna call it a night.

what the chuff

Yorkshire saying - similar to What the F***?! But northern and better.

Bob: Chuffin' 'eck! Larry's gone t' pub withowt meh.

Steve: what the chuff is he playin' at?!