When I watched Tiger King, there was a section about dead crocodiles. One of the interview subjects described them as “Crocodilians”; I thought that was a funny turn of phrase. Later I had a dream in which I heard the Teenage Mutant Ninja Turtles theme song with Crocodilians substituted for Ninja Turtles.

By the way, it turns out crocodilians is a real word and not a neologism; see Crocodilia on Wikipedia.

Here’s a timelapse of the creation process: