keep mum

Verb

 * 1)  To refrain from talking, especially to remain silent about something that may be sensitive or secret.
 * 2) * c. 1940, British wartime poster
 * Be like dad, keep mum.

Translations

 * Maori: whakahū, whakangūngū
 * Russian:
 * Spanish: hacer mutis, no decir ni pío
 * Swedish: hålla mun