2 definitions by Herb N. Dictionary 2011
A tanning bed side effect characterized by untanned spots on the ass, caused by lying in a position that causes the butt cheeks to squish together in such a way that it prevents the UV rays from tanning the entire region.
When I saw her naked for the first time I thought she had Vitiligo on her ass but it turns out it was just dark side of the moon.
by Herb N. Dictionary 2011 August 25, 2011
by Herb N. Dictionary 2011 August 19, 2011