Extremely Intellectually Handicapped.
Ex1: "He's Worse than a Pendy! He's a Fucking Mbbs!"
Ex2: "Hey look it's An Mbbs driving that Taxi!"
mbbs stands for the Muslim Bomb Blowjob Shack. It is a place for people to purchase explosives and oral pleasures. It is normally located in residential areas.
Person 1: Hey what are you doing tonight?
Person 2: Im going to the MBBS to get my genetalia wet.
Person 1: Hey ill come with you! my neighbors cat has been pissing all over my car so i think ill buy some landmines to fix that.
Person 2: Sounds good man!