keep stum

keep stum

To remain silent; to not say anything; to avoid revealing secret or sensitive information. An alternative spelling of the more common "keep schtum/shtum." It's better to just keep stum when the boss starts flinging accusations than risk further incensing him. We'll need to keep stum about this deal for the time being.
See also: keep, stum
Farlex Dictionary of Idioms.

stum

(stəm)
1. n. marijuana. (Drugs.) This stum is cashed. Trash it.
2. Go to stumbles.

stum [st?m]

verb
See stumbles
See also: stum
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • stum
  • stum [st?m]
  • enquire
  • enquire about (someone or something)
  • any fule kno
  • bollix
  • bollix up
  • bollixed up
  • geesh
  • Geesh!
References in periodicals archive
If you read many ex-players' books, they are pretty tame, and if they can keep stum about what goes on in the dressing room, then I am shocked Fergie cannot.
FOOTBALL OPINION: Ferguson revelations show need to keep things..
If their manager is unhappy with that then he should keep stum. If he can't then he should take the M74 to Carlisle and keep driving.
Stuart Cosgrove: Why moaning Mart must quit medalling; BERTI BOYS NEED GAMES