AADO

Pronounced 'Double-A-D-O', AADO stands for 'ave a day off.

Typically used when in disagreement or anger.
Can be shortened to simply 'Double-A' or 'AA'

Person: Fancy going gym later?
Me: AADO

Me: You going out tonight?
Person: Na, got work tomorrow...
Me: AADO

Person: You're an absolute clown bruv.
Me: AADO mate