Bad Utah fans: Yewts
Bad BSU fans: Potato Yewts
Bad ASU fans: Cactus Yewts
Bad USU fans: Dairy Yewts
Bad BYU fans: Cougar Yewts
It's the bad apples that deserve the moniker, not the whole fan base. And, BYU isn't immune from having enough bad apples to give them the moniker.