Laci and Mordred! (Patreon)

I think there's a name for this:

Motorboating (verb)It means the activity of putting one's face between a woman's breasts, and rocking turning one's head rapidly from side to side while making a noise like a motorboat."Put your head between her tits and go bbl bbl bbl bbl..."

(from Urban Dictionary).

This variation is called "Ass Motorboating", and it has the same meaning as a regular motorboating, just adjusting the object of the motorboating to someone's rear.

We learn something new everyday in the internet!