The phrase "wrong side of forty" is often used to describe someone who is older, typically over the age of 40. However, there are several synonyms that can be used to convey the same meaning. Some alternative expressions include "past one's prime," "over the hill," "middle-aged," and "senior." Each of these terms describes a person who has reached a certain age and may be experiencing physical, mental or emotional changes as a result. Regardless of the specific phrasing, the message is similar: growing older is a natural part of life, but it also comes with its own challenges and rewards.