Keep it under your hat
Suggest a CorrectionMeaning
To keep something secret, tucked away.
Origin
From 19th-century Britain, tied to hats; personal spots for secrets, slang by 1880s for mum. An 1885 'Pall Mall Gazette' uses it for a hushed tip.
Variants
- Keep under hat
Usage Examples
- It's a surprise; keep it under your hat!
- He kept the news under his hat till Monday.
- Keep it under your hat; don't spill yet.
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