nickelbacking
exposure of a cat's anus (shitty, like the band) generally exposed during a petting session when he turns his butt toward your face and raises his tail. It is not a good experience, but you figure the cat must be ignorant of how awful it is, because no creature would willingly torture someone in that way (shitty, like the band)

also his butt is round (like a nickel!) and on his backside..
You: "Goddammit the cat is nickelbacking me again"
Me: "Well at least it's not quite as shitty as the band"