flip

vt. 掷, 弹, 轻击
a. 无礼的, 冒失的, 轻率的

I had a quick flip through the book and it looked very interesting.

我很快翻阅了一下那本书，看来似乎很有趣。

A flip answer to a serious question.

对严肃问题的轻率回答