Skinny white girl wearing spandex-like pants who has an enormous butt that jiggles ridiculously. Note: having a jiggly biggly is not a good thing.
Look at that girl's jiggly biggly.

Watch out for that jiggly biggly, it might knock you over.

Here comes a jiggly biggly.
by kathleenann November 2, 2010
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boobs that tend jiggle when you move, usually occurs with DD's and higher.
zamnnnnnn, she got some nice jiggly bigglys i wouldnt mind playing with those.
by mCbillions February 14, 2009
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