1. get out of one’s hair 不打扰某人，不再烦扰某人，可用于离开分别时。

    Well, we’ll get out of your hair. 那我们就不打扰你了。

    1. get in one’s hair 因为不断打扰，使（某人厌烦）

    My roommate has been getting in my hair a lot recently. 我的室友最近一直很烦人。

    1. keep your hair on 别生气，冷静一点

    Keep your hair on. We’ll get there on time.

    1. bad hair day 很不顺利的一天，倒霉的日子

    I’m having a bad hair day today, so I’m wearing a hat. 我的头发乱糟糟的，所以我戴了一个帽子。
    Stop give me a pain. I have already had a bad hair day.不要再烦我了，我今天的日子已经够难过的了。

    1. let one’s hair down 放松，尽情享受

    After work, I always let my hair down and go out to a bar for a drink with my friends.
    下班以后我喜欢放松下来，和朋友一起去酒吧喝酒。