Top definition
When one fingers a partners ass (or themselves) and removes the finger, particles of fecal remain lodged under the nail.
Johnny fingered Susan's butt. After pleasuring her, he removes his finger to find small particles of shit under his nail.
Susan: "Johnny it looks like you have a little chili under your nail"

Johnny: Well the taste is a little off but the color is right on!

Chili Nail
by Carolyn chili nail Bunny November 29, 2008
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