It's a
long abreviation for, Illiterate Bitch-Ass MotherFucker. Starting from the I, to the F it means: Incompetent,/unable to read or write,
punk related, or to be a "pussy", to fuck your own mom, or to be a person, place or
thing.
Dude 1: Yo, wigga, i beat
dat stank ass if you
keeps talkin dat shit
hoeDude 2: Man, he is an Ibamf