Definitions of snuff:

• noun:   finely powdered tobacco for sniffing up the nose
• noun:   a pinch of smokeless tobacco inhaled at a single time
• noun:   the charred portion of a candlewick
• noun:   sensing an odor by inhaling through the nose
• verb:   sniff or smell inquiringly
• verb:   inhale audibly through the nose

  Example: "Snuff coke"

• adjective:   snuff colored; grayish to yellowish brown