fast and furious

1. 喧腾地

Later in the morning, the customers came fast and furious.

近中午时, 顾客们络绎而来。

play fast and loose

1. 玩弄; 反复无常

How can you play fast and loose with a girl's affections?

你怎么可以玩弄一个姑娘的感情呢?

stand fast

1. 不让步

In face of danger, she stood fast and showed her courage.

面临危险, 她毫不让步, 表现出了勇气。