have other fish to fry字面意思：还有别的鱼要煎；实际意思：别有要事，另有他图。

【例句】
If you'll excuse me, I have other fish to fry.
如果您不介意的话，我（现在）还有别的事情要做。

I'm not going with you, I have other fish to fry.
我不和你一起去，我还有别的事。