Big Legs Share definition Flag To "do the big legs" is to eat at a restaurant and run away without paying. Humphrey: That waiter was a cheeky bastard Grahame: yeah.. wanna do the big legs? Humphrey: done Big Legs by Grahame Barnett October 25, 2008 0 0 Get merch Get the Big Legs mug. Buy Now — $32.95 See more merch