a person, usually female, who as sexual relations, especially oral, with many people for little or no gain. See also ho and jd. Can be used as an noun or a verb.
Noun: You know that one girl Tina up the street? She a jump down.

Verb: Tina was jumpin' down on every last one of them dudes at the party.
by qdmasta September 2, 2003
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Maxmoefoe:"Jump down, Jump down and say some fucking gay shit"
*iDubbbz jumps from the fridge*
iDubbbz:"I'm gay!"
by Lol faggot piece of shit July 15, 2017
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Sex position including one male and one female partner. The male holds the female upside-down and sideways between his legs (creating almost a scissor-like leg position) and proceeds to jump up and down while simultaneously jamming his raging boner into either her anal or vaginal crease. The result is a massive jizzbomb, hence the name.
Man, can you believe Peggy let Bill do the Upside-Down Jumping Jizzbomb to her at the Christmas exchange? I heard they even let people photograph them. I don't blame them, that is one challenging move!
by WussGoodWitIT January 22, 2011
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When a girl with diarrhea gets an enema, positions herself on her back with her legs and butt upwards, and her partner proceeds to have anal sex with her in downward thrusts.
Her stomach was upset, but that didn’t stop me from jumping up and down in muddy puddles.
by Valkyrion May 12, 2019
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When you jump up with 2 or more people grab onto their shoulders and sit down in mid-air and land sitting.
Me and Kamel were jumping us and down and now our butts hurt.
by Woundedfrog November 15, 2007
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