Entry 3 senses · 2 variants Webster, 1913 Mum-chance · Mum·-chance · IPA n. a. 01 n. A game of hazard played with cards in silence. 1. A game of hazard played with cards in silence.[Obs. or Prov. Eng.] 2. A silent, stupid person.[Prov. Eng.] 02 a. Silent and idle. 1. Silent and idle.[Colloq.] “Boys can't sit mum-chance always.” — J. H. Ewing.