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A different kettle of fish means a completely different situation or subject from the one being discussed before. People use this idiom when something changes the topic or introduces a new and separate issue.
The expression comes from older British cooking terms where a kettle meant a pot used for boiling fish. Talking about a different kettle of fish meant dealing with an entirely different dish.
The expression comes from older British cooking terms where a kettle meant a pot used for boiling fish. Talking about a different kettle of fish meant dealing with an entirely different dish.
Fixing a small leak is one thing, but rebuilding the whole roof is a different kettle of fish.