A generally unrespected person that would unable to score in virtually any given situation that an average person would be able to score in. Non-Scorers do not necessarily have to be virgins, but it is very likely that they are. Many believe that the term "Non-Scorer" is latin for "socially inept individuals, devoid of good lucks or charming personalities, which causes them to miss out on potential sexual encounters." This has never been confirmed, however.
An average Joe walks into a bar. The average Joe has the potential to score with a chick from the bar. A Non-Scorer does not, unless the situation is such that even a Non-Scorer has a chance (such as the Non-Scorer winning the lottery and the bar being full of hookers).
"No, loser, we can't go on a date. I can sense that you are a Non-Scorer, and thus, sex must always elude you."