grumperdump
a person (preferably a midget) who happens to be in a rather grumpy mood for a reason that no one cares about
grumperdump by Dub C and Chris March 14, 2009
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grumpledumplin
grumpledumplin by AVsearch November 23, 2018
GumperJumper
An inflatable jumper half-filled with mentally diagnosed retarded adults, and half-filled with conscious thinking adults, all having sex with the other, with the female partner bouncing as high up and down as they can on the male genitalia.
Morgan: Hey David, Samantha invited me to a GumperJumper tomorrow night, wanna go have sex with some normal people?
David: eughh uhhhhh ergummmm yeth David I wan go thumping with yew.
David: eughh uhhhhh ergummmm yeth David I wan go thumping with yew.
GumperJumper by PublicToiletLicker August 16, 2025
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