A short form for "bad mannering." Occurs frequently in online games (like LoL, WoW, SC2) in which a player will insult, rage or swear at another player on his/her own team, usually for no known reason.
Blacked-out Fucking. The act of having sex while blacked-out drunk. Such acts usually lead to unwanted side effects such as: soreness, STD's, children, and forced realizations. Also can be used as BOFed