the act of motor boating but using a woman's ass cheeks in place of a woman's breasts

Large, beautiful breasts that are keep well consealed and initially appear to be much smaller and less impressive than they actually are until unleashed.

When you draw nipples on her asscheeks and motorboat her ass.

The act of perform a motorboat, but on someone's anus.

To motorboat a girls ass. Just like the titts except you do it with the butt cheeks