Top Definition
Unknown; something Dr. Peter Shumpmaker's ancestors no doubt built.
"...The guy is Dr. Peter Shumpmaker. Lord knows what a 'shump' is but you can bet your bippy his ancestors made them." -Shoreleave
by Koros December 15, 2009

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Shoot 'em Up
"DonPachi" is one of my favorite Shumps!
by zer0hue August 03, 2003

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The act of taking a shower and a dump at the same time
Forgot to set my alarm so to save time I had to take a shump
by Skaiderade April 05, 2015

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in video games, short for the Shoot 'em up genre.
Mushihimesama Futari is considered to be one of the world's hardest shumps.
by Brightstar March 19, 2007

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A shower and a dump at the same time. Shumps usually take place in the handicap showers at the pool that double as toilet stalls. The shumping process usually consists of the subject stripping down naked, grabbing the detachable shower head, and holding it over themselves as they drop logs. It's also environmentally friendly as long as you're not in California because the shower head can double as a bidet.
Jake: "Hey man, where were you?"
Tim: "I was taking a massive shump. Dude, my asshole has never felt cleaner."
Jake: "Holy bejesus, I gotta try that some time!"
by Shwifty Supreme October 12, 2015

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To take a dump and then take a shower without leaving the bathroom. Wiping is optional. Variaton: shamp - To take a dump while in the shower.
Last night I took a monster shump.
Tom had to take a shower after football practice, but he couldn't hold in his dump, so he just took a shump.
by Stew G December 16, 2006

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shit plus a dump
"I just took a huge shump in your toilet."
by BlackFalcon448 December 01, 2011

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