Definitions by Siddies.
GEM
1. Positive: When something/someone resembles the quality of a fine jewel, either in terms of behaviour or appearance.
2. Negative: Used with sarcasm to describe someone/something that is definately not possessing the good/rare qualitites of a precious jewel.
2. Negative: Used with sarcasm to describe someone/something that is definately not possessing the good/rare qualitites of a precious jewel.