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"Silver Flame" is slang for the tubes of tin foil you use to smoke heroin with.

Silverflame is also the name of a song by the Danish band Dizzy Mizz Lizzy, perhaps about heroin.
Silverflame is an awesome song!

Person one: "I think I'm in love with that silverflame!"
Person two: "Don't you go smokin' too much now!"
by MasterOfMidgets June 18, 2011