Glass-Bottom Steam Boat 

The act of placing cellophane over your partner's mouth, then deficating on the celophane. Your partner then takes your feces into his/her mouth and tongues it through the celophane.

I used'd up all of the saran wrap last night givin' mah bitch a glass-bottom steam boat fo' her birfday

Glass-Bottom Steam Boat by VanMan423 July 10, 2003

Glass Bottom Steam Boat 

Neatly place a piece of saran wrap over your lovers chest. Take a shit on top of the saran wrap. Carefully pick up the saran wrap and have your lover lick the condensation off the bottom.

I wanna fucking give your mother a glass bottom steam boat.

Glass Bottom Steam Boat by JETJOCK March 20, 2009

Torpedoing the Glass-Bottom Steam Boat

While performing the act of defecating on the cellophane over your partner's mouth, a sudden tear accidentally forms and the log torpedoes into his/her mouth.

Tim could not foresee that by having bought the saran wrap at the Dollar Store would only lead to torpedoing the Glass- Bottom Steam Boat and ending a perfect night of love.

Torpedoing the Glass-Bottom Steam Boat by Red Dragon October 18, 2003