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the ledge part of a girls ass just under the cheeks, the more over hang and perky it is the more of a cliff hanger it is!
2 guys

guy 1: hey you see that girl who just walked past? she had a cliff hanger ass!

guy 2: yeah not as nice and grabbable as my girlfriends ass though!
by blahhhhh69 July 15, 2013
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