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1. Literally: The ashing of a blunt, to knock off the burnt material at the end of the L. (dusting a blunt)

2. More commonly: The act of smoking a blunt, usually in a hotboxed car, with 5 people, and using cigar leaf of the White Owl variety. However, dusting a blunt can refer to any blunt smoking occasion.
"Don't get any ash in my car! Dust the blunt into this cup."

"Hey man, you wanna dust a blunt with us tonight?"
by QuesiC September 30, 2006
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