Top Definition
when fat women wear their pants very high you cannot tell where their fat stops and their vagina starts. this large mound of fat in between is referred to as a valump.
"look at her valump, lets make bets on how many kids she had"
by vafump April 07, 2010
A dance move that is similar to twerking in that it involves jiggling the booty. There is one key difference: it involves two people.
Person 1: Hey wanna valump with me??
Person 2: Of course!! Valumping is my favorite past time!
by MoldyVoldy February 04, 2015

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