This is the act of one taking a shit on a toilet whilst another sits on one's lap and shits in the space between his/her legs into the water below. The word missouri, come to find out after coining the term, in a native american dialect means muddy water
Oh man I ate so many corn dogs at the carnival that I had to rush home, no sooner than I dropped my first terd charlene was in there givin me the old missouri lap-dance. I guess she had one corndog too many as well.
by jihad massoud May 27, 2011