Glass bottom boat

[Little_Girl]

A sexual act in which the customer lays under a glass coffeetable and looks up through it, while their partner defecates on the top. How some people find this stimulating Ill never know.
Also can refer to the same positioning with a coffee table but the person on top merely presses their genitals onto the glass, for squashed visual effect - or can refer to defecating onto someones face which has been first covered in plastic kitchen wrap like Saran Wrap.

[Zipporah Schumaker]

When a person shits on on top of a glass table, while someone under neath masturbates to it. like as you would watch fish in a real glass bottom boat.