Eat someone else's lunch Share definition Flag To have relations with someone else's significant other. -Man, that girl is fine, but she's dating my friend, and I don't want to eat someone else's lunch. Eat someone else's lunch by 186716871871867 April 8, 2010 0 0 Get merch Get the Eat someone else's lunch mug. Buy Now — $32.95 See more merch
