Fire Sack Syndrome Share definition Flag When a woman rubs Bengay on your sac and it feels like its on fire. She rubbed Bengay on my sac and I screamed , now i have F.S.S (Fire Sack Syndrome). Fire Sack Syndrome by Sam Bannister May 6, 2007 0 0 Get merch Get the Fire Sack Syndrome mug. Buy Now — $32.95 See more merch