The term used to describe the odd bulge of fabric that appears on the crotch of the skirt when the person is sitting down.
1. This skirt may make my ass look awesome when I'm up, but it has some serious skirtdick when i sit down.
2. He was eyeballing me all suspiciously until I explained to him it was only some skirtdick.
Skinadick is usually used as in insult found in the greek dictionary it means someone who has a skinny dick or someone who injoys get there penis stuck in cheerio size objects