gray cougar
An older woman, usually over 55 years, who still acts or thinks like a cougar but is beginning to show her age. While generally attractive, the wrinkles, gray hair, and loss of firmness are getting harder to hide. Another indication is if she surrounds herself with younger cougars. She doesn't have the stamina to perform like a typical cougar, but she may initiate conversation with prey and allow other cougars to steal the prize. As with all cougars, she will be very confident, possibly flirtateous if the prey is significantly younger. Gray cougars tend to be a bit more reserved in public settings, but may surprise you once in private.
College guy to his wingman: Hey, we gotta get outta here, this place is full of gray cougar and they're starting to notice us.