What is what age is considered over the hill?

The term "over the hill" generally refers to someone who has reached middle age and is now seen as being past their prime or in the later stages of their life. It is often used humorously to refer to someone who is approaching old age or who has reached age 40 or 50. However, the concept of being "over the hill" is subjective and can vary depending on individual perspectives, cultural beliefs, and societal norms. Some people may consider themselves over the hill at a younger age, while others may not feel that way until much later in life. Ultimately, being "over the hill" is a social construct and should not be taken too seriously.