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Long Tooth Horse Grandma's Boyfriend Aged 19th Century Idiom

Idiom Long in the Tooth
Example Grandma's boyfriend looks a little long in the tooth, even for her.
Meaning old; aged
Origin This 19th-century idiom comes from the barnyard. As a horse gets older, its gums move back and the teeth appear longer. So a horse that is "long in the tooth" is getting old. This expression was passed on to people.

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