A "B" is a good friend or Homie that you always laugh with. It can be used in any setting but was originated on Grateful Dead tour in the early 90's. Can also be used to describe when you are very tired and worn out. It can also be described as indentifying someone that has the same name....such as "Where's Jasmin?"....which Jasmin? "Jazzy B"
"Im Tired B"......"Where are all the "B"'s at?"....."meet us after the show, all the "B's" will be there