Noun. indigo (in-di-goh)

1. a blue dye obtained from various plants, esp. of the genus Indigofera, or manufactured synthetically.
2. Indigo Blue (def.2.).
3. any of numerous hairy plants belonging to the genus Indigofera, of the legume family, having pinnate leaves and clusters of usually red or purple flowers.
4. a color ranging from a deep violet blue to a dark, grayish blue.

Adjective. nasty (nas-tee)

1. physically filthy; disgustingly unclean: a nasty pigsty of a room.
2. offensive to taste or smell; nauseating.
3. offensive; objectionable: a nasty habit.
4. vicious, spiteful, or ugly: a nasty dog; a nasty rumor.
5. bad or hard to deal with, encounter, undergo, etc.; dangerous; serious:a nasty cut; a nasty accident.
6. very unpleasant or disagreeable: nasty weather.
7. morally filthy; obscene; indecent: a nasty word
8. Slang. formidable: The young pitcher has a good fast ball and a nasty curve.