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1 definition by simechkr

 
1.
The opposite of the upper decker, which involves leaving a fresh pile of feces on the floor next to the toilet, but none actually in the toilet. The lower decker can be used in many situations, such as the workplace or enemies homes.
"Dude, I totally did a lower decker in the men's bathroom."
by simechkr May 01, 2006
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