Top Definition
A woman who is so fat that when you are getting it on with her you only have to hump her once. Her fat keeps her jiggling for long enough to make it seem like you are still fucking
Man, last night I was with a one hump pump. I left after one hump and she was still shaking when I left 4 hours later!
by maz33 May 02, 2008
6 Words related to one hump pump

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