Jupon \Ju*pon"\, Juppon \Jup*pon"\, n. [F. jupon, fr. jupe skirt, Sp. aljuba a Moorish garment, Ar. jubba.] [Written variously {jupe}, {jump}, {juppo}, etc.] 1. A sleeveless jacket worn over the armor in the 14th century. It fitted closely, and descended below the hips. --Dryden. 2. A petticoat. --Halliwell.