Look, if I tell you something, will you promise to keep it under your hat?

喂，如果我告诉你什么事情，你能答应保守秘密吗？

《柯林斯英汉双解大词典》

I come to you, hat in hand, to apologize for the damage I had indirectly caused and to ask you to reconsider my lifetime ban from the hotel.

我恭恭敬敬地来找你们，为我间接造成的损害道歉，并请求你们重新考虑我被终身禁止入住酒店的决定。

youdao

I haven't got one - use you hat.

我没有兜子——就用你的帽子吧。

youdao

In fact,if I keep talking, soon enough you will start to think I am an old hat about this -- a real expert.

VOA: special.2010.05.09

That's right: I said "unleash the sizzle, " like you are holding a dove and a top hat, and I'm sitting behind a desk with a cigar in the Brill Building.

WSJ: Jason Gay: Super Bowl XLVIII: Unleash The Sizzle

But I have to tip my hat to someone who already said it better than I could, and send you in the direction Grantland for Charles P.

FORBES: The Team That Forfeited a Championship Because It Had to Play Against a Girl

To understand, I need you to take off your fan hat and put on your CEO hat.

FORBES: Antitrust Suit Unlikely To Bring Playoffs To College Football