Workplace Leftovers Gone Horribly Wrong "Something that remains unused or unconsumed, especially leftover food served at a later meal-usually used in plural. Personally speaking, I am a big fan of leftovers with a couple of exceptions, such as french fries and corn-on-the-cob. The purpose of leftovers is to provide an easy lunch or as a treat for snacking the following day but, should you forget about them in the fridge, those delightful morsels of food can be deadly. The Mayo Clinic recommends that leftovers should only be kept for three to four days in the refrigerator; otherwise, the chance of that food becoming a science experiment and you 'driving the porcelain bus' becomes greater. I recently examined the leftover situation in our workplace here at I-95 and here's what I discovered.