Acronym for Faggot Ass Barking Bitch. Normally used towards annoying dogs like a faggot neighbor dog, but may also be applied towards annoying faggot ass people who never shut up.
irritated person #1: Man that neighbor dog never stops barking.
irritated person #2: Yeah, just another stupid FABB.
irritated person #1: FABB?
irritated person #2: Yeah, Faggot Ass Barking Bitch