1、Blood is thicker than water.
血浓于水
2、Have money to burn.
有钱任性
3、Spend money like water.
花钱如流水
4、Shut / slam the door in somebody's face.
拒之门外
5、Walls have ears.
隔墙有耳
6、Two heads are better than one.
三个臭皮匠赛过诸葛亮
7、Rack your brain(s)
绞尽脑汁
8、Tall trees catch much wind.
树大招风
9、do something in one's sleep
闭着眼也能做
10、Every cook praises his own broth.
老王卖瓜，自卖自夸
11、Even water gets stuck in your teeth.
喝口凉水都能塞牙缝
12、Teach fish to swim.
班门弄斧
13、Turn a blind eye to sth
视而不见
14、Money talks.
有钱能使鬼推磨
15、When the cat is away,the mice will play.
山中无老虎，猴子称大王
