white, sometimes crusty remnants of post-nasal drip caused by "doing a line" or "some lines" of an illegal substance such as cocaine or methaphetamine (speed). Possession of any of these illegal drugs is classified as a felony. These remnants will often form ring(s) in the opening of the nasal passages.
Those felony ring(s) are going to get you fired!
I know what he had for lunch. Look at those felony ring(s).
Always check your nose in the mirror for felony ring(s) after lunch.