many happy returns
The phrase "many happy returns" is used as a greeting or well-wishing on someone's birthday. It implies the hope that the person celebrating their birthday will continue to have many more joyful and prosperous years to come. The word "returns" refers to the recurring occurrence of their birthday celebrations.
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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