ummich means your mother in the arabic language, the correct way to say it is "ummik" but it is said in the gulf dialect which makes it "ummich" because those damn camel people keep putting "ch" instead of "k".. weld al ga7ba.. ehem, also, for a male it's ummak, only for a female it's ummich.
A highly versatile word with both noun and adjective forms. In the noun form, it is a derogatory expression often used between friends, and as an adjective, it is more often used to refer to someone being a poontang.
Dude, Craig, you are such a fucking dbag.
Man, Paul was being real fucking dbagish last night when he pussied out on shot for shot.