Live Paint test
Yesterday I was trying to figure out the etymology of the common phrase, “laughing my ass off.” A quick search reminded me that it’s commonly associated with rolling on the floor, ala ROFLMAO (Rolling On the Floor Laughing My Ass Off), so I thought perhaps the phrases are fundamentally linked, and one’s ass is removed because of all the rolling. You know, via a process of erosion.

Sadly, my good friend S pointed out that phrases of the form “verbing my noun off” are simply a common idiom of the English language, and therefore unlikely to have such a logical origin.