1. When a person's outerwear is wedged between the buttocks giving the impression that the buttocks themselves are attempting to eat the garment.
2.
Extreme version of a
wedgie.
3. Often the result of wearing ill fitting undergarments, a
thong or going commando.
When I wore a
thong, my shorts kept trying to
crawl into my butt crack too. It looked
like I had a severe case of hungrius assius.