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scar produced by laying a lit cigarette across the forearm and allowing it to burn along the skin - the longer the scar, the longer the person stood the pain, the less of a sissy they are.

A sissy scar is 1/2 to 1-1/2 inches long narrow scar along the lower arm and caused by a cigarette burning across the skin.
by Mashugana March 17, 2007
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