Man who believes and acts like he has the largest penis in a geographic area, and therefore, feels he rules over other men by size and can claim all the pussies in that area. Area can be defined as something as small as a party, niteclub, campus or town or larger geographic area over which the Biggest Dick in the Box feels he can preside.
One dude to Another in a Club: Who is that flypaper with all the coochies stuck to him
Another: He thinks he's the Biggest Dick in the Box
Dude: Well either he's epic or he's fronting
Another: Either way, he's got coochie action and we don't