Straight from the horse's mouth

In horse racing and trading, the most reliable way to determine a horse's age was to examine its teeth directly — hence getting information "straight from the horse's mouth." The phrase came to mean receiving information from the most authoritative or original source, and it entered common usage in the 1920s.

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Piece of cake Burning the midnight oil In the limelight Break the ice Wolf in sheep's clothing Cup of joe

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