be up to monkey business

• 打算胡闹

be up to monkey business的用法和样例：

例句

1. She knew the children were up to mischief,and she found them digging up the flowers.
   她早知道那些孩子打算胡闹，果然发现他们在掘花木。

词汇搭配

• be up to monkey business 打算胡闹