Mum-Chance

Part of speech: noun (n.)

1. A game of hazard played with cards in silence. [Obs. or Prov. Eng.] Decker.

2. A silent, stupid person. [Prov. Eng.] Halliwell.

Part of speech: adjective (a.)

Silent and idle. [Colloq.] Boys can't sit mum-chance always. J. H. Ewing.