A fine cut or ground tobacco. It was originally 'sniffed' up the nose, causing the user to give a big sneeze. Today, some use it like chewing tobacco in the mouth, that fells like sand in your mouth its so little.
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A "snuff queen" represents a female engaged in a reprehensible and horrific practice of mutilation and homicide for money and which is captured on fild/video. Ownership of snuff material is illegal...