Mumka esk 

the austrailian/new zealand word substitute for sketchy, dodgy, weird, etc.

Guy 1: bro look down that fuckin alley mate
Guy 2: oh mate thats mumka esk man dont go down there you gonna get fucked cunt
Guy 1: mate look, maccas (McDonalds) down there
Guy 2: fuck yeah mate lets go

Mumka esk by TheBeaterOfMeats August 7, 2019