A sexual act in which an individual lies prostrate on the ground while holding a piece of
plate glass directly above his or her face, and while gripping it so as to create a
flat surface in relation to the ground, another individual proceeds to defecate upon it. Some cases may also call for the feces to be smeared or squashed onto the glass using the buttocks and genitals and resulting in more artistic approach to this
time-honored pennsylvanian tradition, which was first introduced by the
amish in the early 18th century.
(This is notably similar to the glass bottom boat, with exception to the necessity of a coffee
table and indicative only of an action concerning
plate glass and shitting. Usage of the term usually denotes a higher level of mobility and/or lower social/financial stature than that of "glass boat" clientele).
Also note: In the absence of any
plate glass, a welder's mask is often substituted for this application.
