Определение и Значение "spring chicken"

What is the origin of the idiom "spring chicken" and when to use it?

The origin of the idiom "spring chicken" is unclear, but it is believed to have originated in the late 18th or early 19th century. It may have originated from the idea that young chickens born in the springtime are generally considered tender and desirable for eating, compared to older chickens that may be tougher. Figuratively, "spring chicken" can be used to describe someone who is young or inexperienced, or to refer to something that is new, fresh, or recently created. It is often used in a light-hearted or playful manner to describe youthful qualities or characteristics.