Meat Day Share definition Flag (Noun) An event to honor amazing meat products (Beef, Chicken, and Pork) by consuming only meats and beer for a twenty four hour period. Bill attended a Meat Day and ate his weight in chicken wings and sausages Meat Day by jmax June 10, 2013 0 0 Get merch Get the Meat Day mug. Buy Now — $32.95 See more merch