keep schtum(redirected from shtoom)
Also found in: Dictionary.
Related to shtoom: keep shtoom
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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