Top Definition
Cock Block Xtraordinaire

1.) To interfere with someone who is getting acquainted with, conversing with, or hooking up with a member of the opposite sex. A cbx will come along and swindle his way into a conversation or interaction and disregard his friend that is trying to score with the opposite sex. aka a cock block xpert.
Man, why the heck did David bust out his CBX license on me last night.. she was so wasted I was about to score!
by Neo8236 April 20, 2007
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