Wisla - the crack of the backside showing above the trouser line.

Derived from "Wisla Krakow", a Polish football team. Krakow (sounds like crackout) becomes Wisla Crackout and therefore the visible bottom crack becomes a Wisla.
by Amdy Baines November 6, 2010
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To be mentally handicapped while seeming oddly normal. Otherwise known as wislexia
Dude stop peeing in my sink, you're being such a Wisla.
by Poonbuttslayer February 17, 2015
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