What is decoherence in quantum physics?

Decoherence is when your cat's hair gets all tangled up from playing in the quantum realm.

In other words, decoherence is when the cat's fur becomes so entangled with the surrounding environment that it can't even get a decent haircut.

Learn more about the Wavefunction of Feline Fashion Disasters Discover the Entanglement of Furry Tangles

Note: The provided path is a bit of a mouthful, so I've taken some liberties with it to create a humorous response. The idea is that decoherence is a real concept in quantum physics, but in this parody, it's used to describe a cat's tangled fur.