its wher you fill the upper tank of the toilet with toilet paper then shit on top of the toilet paper leaving an even better effect to the upper decker
dave left a temple decker at work last night i wish i could of seen the janitors face when he seen that
by dirtydave October 11, 2006
After meeting Mickey Mouse on main street, I took a quick stop in the mens room to take a vicious disney decker.
by DisneyDude(DD) February 17, 2011
Valerie was so drunk she did an upper decker in her friends toilet at the party, and everyone smelt it.
by valere March 14, 2008
Taking a dump in the upper part of the toilet at any McDonald's owned corporate or affiliated franchise restaraunt location.
After eating 3 Big Mac's, 2 McDouble's and a McChicken, I went to the womens room and took a vicious McDonald's Decker.
by McDonalds Dude (M.D.) March 07, 2011
After I caught an upper decker at Busch Stadium, I went to Dan's house where I left a beefy sewer pickle in the tank of his toilet.
by porknut August 11, 2005
When you get all horny and shit and you need that somethin' special so you go get a screwdriver. Then you pound your girls ass with it. Afterwards you take that very same screwdriver and use it to build a spice rack. You then give the spicerack to your women. DAMN!
by Nick Mcjesusman April 09, 2005
To take a shit in the top of the toilet, therefore when the toilet is flushed, brown water washes the poop down.
by chops renfer August 22, 2006