old chestnut
The phrase "old chestnut" is used to describe an idea, joke, story, or topic that has become overused, repetitive, or stale due to its frequent or long-lasting usage. It implies that the subject is familiar and has lost its originality or novelty.
An idiom is a phrase or expression that usually presents a figurative, non-literal meaning attached to the phrase. Does that sound fun? It can be!
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