1 definition by Detonatornova

Top Definition
Related to the upper decker, this is when you take a crap onto the closed lid of a toilet. It gives a quicker reaction than an upper decker, while not being as damaging in the long run.
"Yo, Johnny left a middle decker on our only toilet! Now I gotta use the bushes!"
by Detonatornova June 25, 2006
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