MB/MBF stands for Makk Balla/Makk Balla Family and it's a gangdat used to be part of da Blood Hound Brims but they got kicked out, it's originally from NYC and they're all ova da city.
On musicbanterdotcom a member named bungalowbillstarted a thread called "The Justice Thread"...it later became known by some people as "THE MB MOD CONSPIRACY THREAD". The thread was about how some exotic booze should have been ban because she defied a perma ban by a mod. BUT. Little did bungalow know, some exotic booze sorted it out with the mod AND rozi. But the dick refused to give up. It came to be known as The MB Mod Conspiracy Thread because it downed the mods and questioned their decisions.