Roast Beef and Milk Share definition Flag A slang term used for a women's vagina after a nut was busted inside of her. Yo, when I went down on my girl it was like eating roast beef and milk! Roast Beef and Milk by F U H November 17, 2017 0 0 Get merch Get the Roast Beef and Milk mug. Buy Now — $32.95 See more merch