| 词汇 | keep it under your hat |
| 词源 | keep it under your hat. Keep something under your hat and it is kept to yourself, it remains a secret to anyone but you. Un- like “blockhead,” which goes back to the first hats, the expres- sion is of surprisingly recent origin, having been first recorded in a similar form in 1909 and recorded in its present form in P. G. Wodehouse’s The Inimitable Jeeves (1923). |
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