scapegrace
n. 饭桶；不可救药的恶棍；流氓
例句
Our royal sister's mind will be greatly eased when she sees our young scapegrace safe in our lodging.
我们的王姊看到年轻的淘气鬼安然无恙地落在我们的手里，她一定会大大的放心了。
