Fandom Rivalry: Juggalos vs. Eminem fans, not really because of their music, but their real-life rivalry. Also, Juggalos vs. Maggots, even though Slipknot's own members are Juggalos. ICP and Slipknot are actually mutual admirers, although ICP is not fond of Slipknot's decision to call their fans "maggots".
Fan Dumb: Obviously not all their fans, but there are definitely some that fit the trope.
Fan Hater / Hate Dumb: Who goes to the Facebook, My Space or YouTube page of a band you hate every single day just to troll them? Not to mention the Hate Dumb that thinks it's a good idea to publicly call for genocide of that band's fans. Even worse, some of these idiots are posing as ICP fans in attempt to slip actual ICP fans poisoned Faygo.
"Miracles" resulted in some people lumping ICP in with creationists, even though the song's about seeing and experiencing things for the first time through the eyes of a child and was written with the rappers' own kids in mind (who appear in the music video wearing their respective daddies' facepaint styles).
Memetic Mutation: "Miracles", both the music video and some of the lines from the song itself (eg. "Fuckin' magnets, how do they work?", "Magic everywhere in this bitch"). Based on some of their comments, it seems that this might be one of the only recorded successful attempts to create a Memetic Mutation by the creators of the meme themselves.
Paranoia Fuel: "The world famous Boogie Woogie Wu will come to you! Slumber parties, sleepovers, intimate nights, whatever the occasion for the midnight hour, he will gladly come and fuck that shit up!"
Sampled Up: A weird case. "Bowling Balls" samples the Public Enemy interlude "Security of the First World". Most Juggalos recognize the original, but not a reviewer, who believed that ICP sampled Madonna's single "Justify My Love", which samples the Public Enemy beat.