anal bitch, generally. some one who pays too much attention to things that don't posess any qualities worth paying attention to. consequently, an ass mongrel's presence is less than appreciated, due to being such a tool.
Dude, I was working with Dave the other day, and he fucking narc'd me out for not wearing my name tag to LuAnn. (mumble mumble dumb bitch)
Man, he's such an Ass Mongrel.