A Juggalo is like an extreme "dead head" for group Insane Clown Posse. They wear clown make-up and other crap to emulate the group. For some reason, they are obsessed with the classic soft drink Faygo "pop" [thus the reference to it above]. Some nuts from the Northwest associated wtih this "cult" have committed/threatened violence as part of their "rituals".
DaB's little sister Ceara has been invited to join their brood, but for some reason declined enlistment.
btw, I hear that they hunt Russian Jews with enema obsessions.
EDIT TO ADD PIC:
Note the blood and the butcher's cleaver. You can also see a gun held by the figures depicted on the baby's coffin.