CB3-O 

Another name for someone who is a Cock Block (hence the CB), just with a replacment of the letter "P" on the name of the Star Wars character C-3PO with the letter "B".

Friend 1: "I was hooking up with my girlfriend and just as it was getting heavy my boy Max came in the fucking room and like a giant CB3-O, just started talking!"

Friend 2: "Wow, what an asshole"

CB3-O by ming chow November 15, 2011