Collins Chinese Dictionary Plus (3rd edition), 2011:
是非 shìfēi 名
1
(=对与错) right and wrong
- 他不辨是非。 Tā bù biàn shìfēi. He can't tell the difference between right and wrong.
2
(=麻烦) trouble
- 他老惹是非。 Tā lǎo rě shìfēi. He's always making trouble.