The Seasonal Flu Share definition Flag The flu that looks like a pussy compared to The Swine. "I think I've got The Seasonal Flu.""At least you don't have The Swine. It's A LOT worse." The Seasonal Flu by southparkrox October 12, 2009 0 0 Get merch Get the The Seasonal Flu mug. Buy Now — $32.95 See more merch