Denshi Jisho — Online Japanese dictionary

Found 2 sentences.

そんなに舐められた相手じゃないけどなぁ・・・」「そうだ窮鼠猫を噛むって言うじゃない "I don't think she's an opponent you can ignore like that ..." "That's right, they say a cornered rat bites back, don't they?"
あいつ追いつめられたらする窮鼠噛むってことある。気付けるに越したことい。 I wouldn't push him too far. You don't know what he might do. I'd say you can't be too careful. They say even a doomed mouse will bite a cat if he has no choice.