Similar to an upper decker, however the turd is taken in the upper tank of a gravity fed toilet (those which the tank is suspended 6ft up). When flushed the turd is sent flying down the pipe fed by gravity and makes a large splash similar to that of a log flume ride.
by Josh Bird September 09, 2006
"I sexboomed right over her face"
"I sexboomed your mum"
"I'm gonna sexboom"
"Don't sexboom in my ______"
"I sexboomed your mum"
"I'm gonna sexboom"
"Don't sexboom in my ______"
by Josh Bird September 24, 2008