Not just a cock, but the Head of all Cocks and some assholes.
When it's not enough just to call someone a dick head.
When someone gets you so pissed off at them you can not logically think of a insult that fits them, then they become a Grand Master Cock Dragon.
Soup:Dude why do you keep jankin my kills?
Blackop: cause I guess I am a cock. I really don't give a damn man!
Soup: (Pissed off to no resolve) Fuck you you fuckin cock ass... You Fuckin fuck... Your uh... Uhh.... I don't know a Fuckin Grand Master Cock Dragon bastard!!!
Blackop:...... Thanks buddy.