A serious condition effecting people who are under the influence of alcohol. Victims believe that everyone, friends, family, and strangers, owe them $20 for no reason whatsoever. The only cure is a good night's sleep, often times immediately after vomiting on something very important to you.
Dude did you see Dave last night... he was stumbling all over the place and yelling at everyone for owing him money.. then he threw up on his parents. It was textbook Kevin Nelson Syndrome.