【俚語】

An old head on young shoulders
年輕而老練

【例句】

He’s only seventeen, but he has an old head on young shoulders and remains calm under pressure.
他只有十七歲，但他少年老成，在壓力下能夠保持冷靜。

Be off one’s head
發瘋，精神錯亂

【例句】

You must be off your head going out in this weather!
這種天氣出去你真是發瘋了！

Bury one's head in the sand
逃避現實

【例句】

Stop burying your head in the sand, Tim. Don’t pretend that everything’s all right.
Tim，別再逃避現實了。別假裝一切都好

Give sb. a heads up 事先通知

【例句】

Just give me a heads-up if you need a ride.
如果你需要我載你一程，事先通知我。

Put their heads together
共同出謀劃策

【例句】

If the two of you put your heads together, I'm confident you’ll figure out a workable solution.
如果你們兩個人一起共同出謀劃策，我相信你們會想出一個可行的辦法。