A beard that is so remarkable and must be photographed, documented, or even commented on, in order to label it with significance; usually for later conversation about how epic the beard was.
When something surpasses legendary status; something so awe inspiringly jaw dropping that it will make you shit your pants due to the amount of legendary given off by it's mere presence.
Bob: this sandwich is incredibeast.
Bob: *shits his pants as his jaw drops to thefloor in amazenment*