A Persons ass that is both:

1)Non-symmetrical (width and depth), and is chunky,lumpy and purely unappealing.
2)jiggles and shakes like jello with ease by using only the slightest step or hip/waist pop
Person 1)Hey,did you see that person's huge ass?
Person 2) Yeah,she has a real Wacker Neuson on her,that thing shakes!
by Richierich7896 August 10, 2017
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