Noun: Disparaging term for a brony, particularly the type who is either actually sexually aroused by equines, or at least jokes about it and smugly uses the term "plot" to mean ass due to seeing one joke image about being sexually aroused by equines. People who use this term may apply it to all bronies.
A ceremonial rite of passage practiced by the Meskwaki tribe of Native Americans. The ceremony consisted of the Meskwaki chief riding into the camp (normally at a tölt gait), on an Icelandic horse. The chief retrieves a dish of melted cheese and places the horse's genatalia into the dish (ergo, cheeseballs). The chief then takes a radish from the horse's mouth (ergo, horseradish) and dips it into the cheese. The chief offers the horseradish cheeseball to the young Meskwaki initiatve, who eats it and becomes a full member of the tribe.
Stefon: Have you read about the horseradishcheeseballs that the Meskwaki Indians eat? It's the craziest initiation ceremony I've ever seen.