mum : Idioms & Phrases


keep mum

  • verb refuse to talk or stop talking; fall silent
    shut up; close up; belt up; button up; clam up; be quiet; dummy up.
    • The children shut up when their father approached
WordNet

mum-chance

Mum"-chance` noun
Definitions
  1. A game of hazard played with cards in silence. Obs. or Prov. Eng. Decker.
  2. A silent, stupid person. Prov. Eng. Halliwell.
Mum"-chance` adjective
Definitions
  1. Silent and idle. Colloq.
    Boys can't sit mum-chance always. J. H. Ewing.
Webster 1913