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keep schtum

To remain silent; to not say anything. (Used especially when by saying something, especially at the wrong time, one would cause trouble or difficulty for him- or herself.) Primarily heard in UK. It's better to just keep schtum when the boss starts flinging accusations than risk further incensing him.
See also: keep, schtum

keep ˈschtum/ˈshtum

(British English, informal) say nothing: I think we’d better keep schtum about this money, don’t you? OPPOSITE: open your (big) mouth Shtum is a Yiddish word from the German stumm, meaning ‘silent’.
See also: keep, schtum, shtum
References in periodicals archive ?
I had to keep schtum but I wanted to say "what a load of elitist crap".
DJ's playing the festival include Tom Middleton, Ashley Beedle, The Reflex, Get Down Edits, Keep Schtum and many more still to be announced.
He said: "If you are privileged enough to work for the Royal family you keep schtum.
But when the op is a success, Jesse decides to keep schtum and bask in the glory.
Chas agrees to keep schtum about his affair with Aaron, but it's too late.
Whoever that happy woman in the photos is, Najwa has kept schtum on her end of the celebosphere and is yet to make a comment
But even with that dilemma sorted, John Paul is wondering whether he should keep schtum about his fears for his cousin's happiness.
How come women are expected to be honest while men keep schtum about their failings?
Miss Piggy, who dons the ivory couture wedding gown in the movie, has been trying to convince Kermit the Frog to marry her for years but film bosses have kept schtum on whether fans will see them finally manage to tie the knot.
The Jimmy Savile case is, however, one where the ordinary bods finally turned and refused to keep schtum when their Lords and Mistresses dumped that Newsnight investigation.
Therefore I have decided to stay schtum rather than provide them with yet more evidence they're working alongside a 'Philistine', as one unkindly dubbed me.
London, May 9 ( ANI ): Johnny Depp, usually is open about his off-screen life, is keeping schtum on his supposed split with French lover of 14 years Vanessa Paradis, in case their kids Lily-Rose and Jack read about it online.
DANNII Minogue is staying schtum about rumours she could be appearing as a judge on the upcoming series of Britain's Got Talent.
Snax 24 is keeping schtum on reports that it is part of a consortium bidding for Total UK and Murco.
Attempting to discuss matters of state above the din of popular music is extremely difficult, while the low-wattage lighting appears designed more for the benefit of "apple-shaped" customers trying on the latest Diamante Ruch Bandeau Dress than ministers me to keep schtum or reading complex documents on grain yields.