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That little wrinkle of fabric in the rear of the crotch area of really really tight white short-shorts that young horny females wear, particularly at festivals such as stereosonic and goodvibes, where this term was coined.

It becomes more apparant when a girl is obviously wearing a pair that are obviously a size too small for her, thus increasing potential for cameltoe.
Shaz: Damn bro! check the girl in those short-shorts over there!

Stav: Wow man, thats some hell arse wrinkle right there...
by rv351 March 05, 2010
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