Mumpish

n. [ Prov. E. mump to be sulky. Cf. Mump, Mumble, and Mum. ] 1. pl. Sullenness; silent displeasure; the sulks. Skinner. [ 1913 Webster ]

2. [ Prob. so called from the patient's appearance. ] (Med.) A specific infectious febrile disorder characterized by a nonsuppurative inflammation of the parotid glands, and sometimes causing inflammation of the testes or ovaries; also called epidemic parotitis or infectious parotitis. It is caused by infection with a paramyxovirus. [ 1913 Webster +PJC ]