他是个笨家伙。

He's an awkward cuss.

笨家伙！这是你今天打坏的第二个玻璃杯。

You clumsy oaf —that's the second glass you've broken today.

你这个笨家伙这是你今天打碎的第二个玻璃杯！

You clumsy oaf that's the second glass you've broken today!