at the drop of a hat

意思

immediately and with very little encouragement

立刻，稍一提起就做.

例句

1. 1Mention a weekend away and Leah will pack her bag at the drop of a hat.
2. 2Our neighbour will start singing at the drop of a hat; nobody needs to ask twice.
3. 3Just mention chess and my brother will fetch the board at the drop of a hat.
4. 4With her bag always packed, Nora can leave for a trip at the drop of a hat.
5. 5One tiny complaint and he offers a refund at the drop of a hat.

文法

固定的副詞片語。保留 at、冠詞 the 和 a，以及單數名詞 hat。

意思相近