When someone takes a shit in the upper part of the toilet so that next person to flush gets a shitty surprise
I think my prankster cousin took an upper dumper in my toilet before he left last night, i flushed the toilet my piss was gone only to be replaced with diarrhea-water.
by Idontgiveashit October 8, 2013

The act of sneaking into someones home to take a shit in their kitchen or bathroom sink. Usually done out of anger or aggrevation.
by NitroCore24 September 29, 2012

by NerdAnnihilator April 29, 2021

When one shits into the asshole of their sex partner, usually performed after one has seen 'Two Girls and a Cup'.
Charles: "Dude, why do you have dragon breath?"
Manfred: "It's not dragon breath, Katy gave me a Danny Dumper last night."
*Charles snickers*
*Manfred Donkey Punches him*
Manfred: "It's not dragon breath, Katy gave me a Danny Dumper last night."
*Charles snickers*
*Manfred Donkey Punches him*
by anonymous555666777 May 21, 2012

man is going out with woman. man sleeps with woman then soon after dumps the woman. the man is then called a humper dumper.
by JG9 March 11, 2009

when you take a shit and some shit gets caught in our hair about the size of a nickle, and probably worth 5 cents
by sneaky nagger May 8, 2006

by JJ Dirtbag May 10, 2016
