n.开玩笑的言行，戏谑 v.愚弄，耍弄( fool的现在分词 ),欺骗,开玩笑,说蠢话，干傻事（常为逗乐）
What are you doing fooling with such a staggering sum of money?
你拿着这么一大笔钱瞎折腾什么呢？
Have you been fooling around with something you shouldn't?
你有没有做不该做的事？
They were fooling around on an Army firing range.
他们在军队的射击训练场里闲晃。