IdiomAnimalsGerman

Zwei Fliegen mit einer Klappe schlagen

Meaning: To achieve two aims with a single action.

Literally: To swat two flies with one swatter

Example: “Wenn ich auf dem Heimweg tanke, kann ich gleich einkaufen. So schlage ich zwei Fliegen mit einer Klappe.” — If I get gas on the way home, I can do the shopping too. That's killing two birds with one stone.

English equivalent: To kill two birds with one stone

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Origin: Duden lists it as a colloquial expression for achieving a double purpose at once. The Klappe is a fly swatter (Fliegenklappe): one lucky swat, two dead flies. Dutch uses the same picture. No first use is documented.

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