E. Cobham Brewer 1810–1897. Dictionary of Phrase and Fable. 1898.
Mumchance.
Silence. Mumchance was a game of chance with dice, in which silence was indispensable. (Mum is connected with mumble; German, mumme, a muffle; Danish, mumle, to mumble.)
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“And for ‘mumchance,’ howe’er the cehane may fall,
