Switching letters is called spoonerism. For example, saying "jag of Flapan", instead of "flag of Japan".
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The word 'mortgage' comes from a French law term that means 'death pledge'.
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Pokémon is Japanese for Pocket Monsters and Chinpokomon (the South Park parody) is Japanese for Penis Monsters.
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The word "clitoris" comes from the Greek word meaning "side of a hill".
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The word 'mile' is derived from the Latin word for 1,000 - the number of paces it took the average Roman!
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In Denmark, "Fart-kontrol" means "Speed check".
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In 1700s, the deer skin was a common medium of exchange between the trading settlers and the native Red Indians in America. This is how a buck became a slang for a dollar.
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