Adjective:

1. characterized by a feeling of irresponsibility;

   "a broken back is nothing to be casual about; it is no fooling matter"
   

They were fooling around on an Army firing range.

他们在军队的射击训练场里闲晃。

Stop fooling about, man.

不要再扮傻充愣了，老兄。

If you go on fooling with that gun, there'll be an accident.

如果你继续瞎摆弄那枝枪, 就会发生意外.

This time he wasn't fooling; he meant business.

这次他可不是闹着玩的, 他说到做到.

He is always fooling in class, but the teacher will catch up with him some day.

他总是在班上捉弄人, 总有一天老师会抓住他的.

Better look out who you're fooling with next time.

下次你最好是当心点,看你是跟谁打哈哈.

Stop fooling about with that knife or someone will get hurt.

不要摆弄那把刀,会伤人的.

They aren't out fooling around.

他们不会在外边闲混.

This isn't time to be fooling around.

这可不是吊儿郎当的时候.

I've been fooling around and I'm a dog.

就怪我这个不成材的人,净干蠢事.

You are fooling away your money.

你这是在浪费钱.

' Quit your fooling about that, ' he said , in an offhand way. ' Were you serious? '

“ 不要开玩笑了, " 他随便地说, " 这事当真 吗 ? ”

' No fooling, I've really got a thing about you, so count yourself in luck!

“ 不屈心, 我真疼你, 你也别不知好歹!

Mother worries about Stuart and me fooling around these lakes as it is.

斯图尔特跟我老是象这样在湖上瞎玩,妈妈真担心.

Where have you been fooling around?

你最近在哪里鬼混?