Top Definition
Acronym for "Asshole Best Friend Forever".

A variation of a friend that sends abusive text messages, incessantly taunts, and acts like an all around douche to another friend, all in good fun.
(Text Received from ABFF) Hey bitch! Why don't you grab your knotted dick and feed it to your master, you grobsmacking, douchehuffing, butt battering, clit punching cock champion? Lunch in a little bit?
by The ABFF September 07, 2011

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