孬种

zài dǎi tú miàn qián bù néng dāng nāo zhǒng

在歹徒面前不能当孬种。

You can't be a coward in front of gangsters.

bié hé zhè ge nāo zhǒng jì jiào

别和这个孬种计较。

Don't bother yourself with this rascal.