Just for kicks. I did it just for kicks.

我做这事就是为了耍一下。也可以说。

I did it just for kicks .

我只是为了好玩才做那件事的。

He's the sort of person who would pull the wings off a fly just for kicks.

他就是那种人，会把的苍蝇的翅膀拉下来逗人玩。

Since the elevator is really slow, I pulled my pants and underwear down just for kicks. Just then, the door opened to let a girl on at the 4th floor.

因为这部电梯速度很慢，于是我就在电梯里脱下裤子想找点刺激，结果电梯在4层开了门，一个妹子走了进来。