...during a recent methamphetamine bust in Mississippi.

The "B" stands for "Brandi." As in "Brandi Favre, Brett Favre's younger sister." Here's a recent Glamour Shot^TM of the lovely Ms. Favre pulled from the Barking Carnival files:

Look, you may not like Brandi Favre. But you have to respect the way she mixes up methamphetamine. She does it for pure love of the homemade drug trade. She really has fun with it, just doing her thing out there in the meth lab, having a good time, cooking up highly-addictive narcotics like a kid.