B14 means 'bitch' (spell: bich);
Used by Russian communes online, for example, in chat-rooms.
''1'' reads as ''i'' as in 1337-speak. While 4 in Russian is spelled "Chitiri" and is often used to replace "ch". (As other example, people use 6 (Šeštj) in chat and forums to replace "š" as well.
B14 is used the same way as normal "bitch".
Admin: player 2, please, give back the items you stole from player 1 or I might ban you.
Player 2: I ain't giving u anyth1ng, b14!
In Call of Duty 4, B14 or b14 is the key sequence for the epic taunt "Base of fire!" an exclaimation used by an elite few, to signify their pure and utter awesomeness on the fields of battle
Player A: b14!
Player B: B14!