A mature woman (old enough to be the mother of a high schooler and usually the product of a failed marriage) who has kept themself in good enough shape and style to compete with the younger early to mid 20s females for the silver back males at bars. A cougar's sexual appetite demands a healthy physically fit mate. For this reason, cougars are especially attracted to younger males.
Cougars make great mates for younger males because they usually have their own house and no roommates, no interest in reproducing, their own alcohol, fake breasts, don't expect you to call the next day, and don't require much cuddling after a good one night stand.
"Hey see those cougars on the dance floor?? The one on the right just handed me a hotel room key and said she had a bottle of wine she needed help with in room 412 at the Hilton"