Top Definition
When someone withholds their feces for days at a time, building up pressure. Finally, when the person must Excrete Fecal mater -- they are done within a matter of seconds.
1) Fred didn't turd for thirteen days; when he finally ran into the bathroom, the janitor's were in awe of his seven pound "Dookie"
John:"Brb dude."
Jake: "Allright"
John: (Thirteen seconds later) Back.
Jake: Legit homie, what were you doing?
John: Insta-dumping is the new timesaver for me. :)
by petar113507 October 28, 2008
6 Words related to Insta-Dump

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