What is Shush Ya Mush?
A polite way of saying shut up. (As polite as slang gets anyway!)
Shush meaning 'be quiet'
Ya meaning 'Your'
Mush meaning 'face/mouth' etc.
You starting on me bruv?
I don't need you!
Ahh shush ya mush.
See mush, shush, quiet, shut up, shh