Australian slang,
short for 'shut the fuck up you
cunt'. More or less the same as any Australian slang with the word '
cunt' in it, it's meant to be used casually or by some dumbcunt to sound threatening.
Bazza: Stevo did you take my durries ya dumcunt?
Stevo: *on phone, doesn't give a shit*
Bazza: Oi
mate I'm fuckin talkin to ya-
Stevo:
FUCK UP CUNT! Git off ice, throw the first punch!