The act of defecating in the
upper tank of the toilet. When the next poor unsuspecting person flushes the toilet they get a bowl of
beef stew.
the upper decker is a weapon of terror and should only be used on people who deserve it.
My friends x-girl friend had a party and she left
whith some other dude who looked like
the fonz "
Heyyy!". So I took it upon myself to leave her an upper decker