big shot =VIP

大人物,大头

例句：

You can tell John is a big shot, he rides in a limousine everywhere he goes.

你可以看出约翰是个大人物, 无论去哪里他都坐豪华轿车。

overdo
做过头

例句：
Don't overdo your gratitude.
感谢的话不要说 过头。