Glitter Kitties is a nickname for an NFL team called the Jacksonville Jaguars. This nickname was coined in part because of the super sparkly helmets that said Jaguars wear. Jaguars are of course a large variety of cat. So, it wasn't much of a leap for people to start calling them the "Glitter Kitties."
This nickname is thought to have been coined by Indianapolis Colts fans. Even if that is not the case, we do hereby take credit for said coining of the nickname
Bob: I heard that the Glitter Kitties might be moving to LA.
Bill: I heard that too. Most of their fans have lost faith in them.
Bob: Haha, that's pretty sad.
Bill: Yeah, but we hate the Glitter Kitties, so it's kind of funny too!
Bob: That is true. Go Colts!