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"