In plain English: Any prime and mature woman seeking or prowling for younger men.
The term Cougar was coined to any woman seeking a youger man. Like the animal of the same name, they constantly hunt for fresh meat they can sink their teeth into. Cougars tend to seek energetic guys that are mostly vulnerable.
Many guys would have wished that their cougar counterparts would have baby sat them so they could have lost their virginities at a way younger age, without the fear of mommy or daddy knowing it.
One prime example of a cougar is Mary-Kaye Letourneau.
Dan : Where were you when I needed a baby sitter to babysit me hey ya cougar!
'Rianne : That would have been bad...