Its a short form of best buds.
Gamer#1," hey bb! You trying to play LoL?"
Gamer#2," sure, let me hop on bb."
Short for 'burning ball syndrome'. Many times is a case of jock itch. However, may also be a symptom of a std (get it checked son). Common amongst athletes and beach gowers (sand in the shorts, ouch). If you get bbs, gold bond powder is your best friend. Frequent sufferers of bbs generally keep gold bond in their locker or bathroom.
Ex 1: "Dude, I was free-balling it at the beach this weekend and got a wicked case of bbs."
Ex 2: (Girl) "What's that on your nuts?" (Guy) "Don't stop baby. It's just some bbs."
Blue Ball Syndrome. Some girl that is a total cocktease, that you get Blue balls from
Yeah ive been after this girl for a month, she gives me mad BBS