Jemmies meaning : A baked sheep's head. An immigrant. A greatcoat. (especially New England and Philadelphia) Chocolate sprinkles used as a topping for ice cream, cookies, or cupcakes. A marijuana cigarette. A device used to circumvent a locking mechanism; a slim jim. (Royal Navy) First Lieutenant (Executive Officer) A jemmy; a crowbar used by burglars to open windows and doors. A penis. A condom. (SE) Men's underwear. A male crab; a cock. A coal-car.