This is an insulting term of address for people who are stupid, irritating, annoying or ridiculous. Mostly used to show lack of respect to the person.

Eg: like Underground

Yeah! Am one crazy motherfucker. Thats why I drive whack nitwits like smokey-mc-asswipe crazy.

kidz dnt knw wen to stop... u are already dead... u rank have byn reduced to .... d worst mic rocker

nice to know

you are a motherfucker.