A Taint

1. A contamination, decay or putrefaction, especially in food.
2. A tinge, trace or touch.
3. A mark of disgrace, especially on one's character; blemish.
4. (obsolete) Tincture; hue; colour.
5. (obsolete) Infection; corruption; deprivation.
6. (programming) A marker indicating that a variable is unsafe and should be subjected to additional security checks.
7. (slang) Slang term for perineum