莫在太岁头上动土
Let sleeping dogs lie.

毕恭毕敬
cap in hand：He always treats his boss cap in hand.

得意忘形
to leap out of one's skin

捷足先登
The early bird catches the worm.

欲速则不达
Haste makes waste./More haste, less speed.

欲加之罪，何患无辞
Give a dog a bad/an ill name and hang him.

混水摸鱼
to fish in troubled waters

贪小失大
penny-wise and poundfoolish

习惯成自然
once a use forever a custom

挂羊头卖狗肉
cry up wine and sell vinegar  

小Car笔记：
troubled waters：混乱状态，波涛汹涌的水
poundfoolish：省小钱吃大亏的，因小失大的
cry up：夸奖(称颂)

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