Coyote'ing

This phenomenon occurs when you really really need to take a shit and are in close proximity to a toilet facility. Your sub-conscious mind sees said porcelain and tells your asshole its okay to let go, and so the little pooh starts to slide out. Your CONSCIOUS mind panics, as do you, and you immediately tighten up and pull the little fellow back in. This battle continues with the turd peeking in and out of your asshole like a nervous coyote on the look out from his hidey hole. Hence this is a verb of the word coyote.