an acronym for Cock Block Killas, usually used to get someone to intercept a females friend or family member from cock blocking at a party or function
Me: aye look natalie is drunk off her ass and about to go give peter some dome in the hot tub...kudos
Natalies friend: OMG NATALIE YOU BETTER NOT YOU HAVE A BOYFRIEND!!
Me: No-e go CBK on that beezy before its to late