Cocoricocoboy is an old French TV Show. Often reffered to as an
idiot or someone who thinks they're mad or awesome. Mainly used on
guys, because it is CocoricocoBOY. But can be used on
girls also.
Person 1: That guy reckons he's so Cocoricocoboy.
Person
2: Yeah I know, what a bert.
Another example:
Guy 1: Look at that girl, she's
dating such a Cocoricocoboy!
Guy
2: Haha, yeah I know!