Gruncle-core is a genre of music developed by Gusher, it started off as a joke within its members and eventually stuck. Zacque Dana of the band originally heard the word from a friend whom he'd worked at a factory with when he lived in a small farm town in northern Illinois. The friend explained to Zacque that he knew a local girl who had a "gruncle," which meant that somehow through inbreeding she had a grandpa who was also her uncle. Gusher began to descride their rowdy brand of noisy, sometimes melodic, loosely and aggressively played rock and roll, jokingly, as Gruncle-core. The name eventually turned into a way to describe any band that was just plain rowdy, dirty, noisy, surly, smelly, loud as hell, totally badass, etc.