Switching letters is called spoonerism. For example, saying "jag of Flapan", instead of "flag of Japan".
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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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A “butt” was a Medieval unit of measure for wine. Technically, a 'buttload' of wine is about 475 liters, or 126 gallons.
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Stressed is Desserts spelled backwards.
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The word 'mortgage' comes from a French law term that means 'death pledge'.
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If you mouth the word "colorful" to someone, it looks like you are saying "I love you".
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Longest officially recognized place name is Taumatawhakatangihangakoauauotamateapokaiwhenuakitanatahu.
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A group of pugs is called a grumble.
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