What's the age requirements of being a cougar?

A cougar for me would have to be about 95 years old.

It's usually when a woman turns 40 that she is considered to be a " Cougar " !

It's relative. Hippy tried to set an upper limit but I don't think he went far enough.

You can't really define a cougar by age; cougarism is an attitude and every morning I get down on my knees and thank God for inventing these wonderful women. I pray that one day I might meet one.

But there seems to be an upper age limit and I quote no less an expert than that self-styled love-guru, very special agent Anthony DiNozzo who said that an ageing cougar morphs into a turkey buzzard. "She still likes to hunt but no longer has the power to bring down her prey."

According to this definition (last sentence below) death minus 3 minutes to 1 hour, contingent perhaps upon the age of the male.

https://en.wikipedia.org/wiki/Cougar_(slang)

Cougar is a slang term that refers to a woman who seeks
sexual relations with considerably younger men. ABC News states that these
women pursue sexual relations with people more than eight years younger than
they are, while The New York Times states that the women are over the age of 40
and aggressively pursue sexual relations with men in their 20s or 30s. However,
the term can also refer to any female who has a male partner much younger than
herself, regardless of age or age difference.

I would say 40.