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2.
An attractive woman older than 50 years old, who is on the hunt for younger males. She may be found in nightclubs and bars hunting for her prey.

Grandcougars are generally post postmenopausal and can be easily identified by their frequent hot flashes and night sweats.
I bagged a Grandcougar last night at the club.
Por TireIronTaylor 09 de noviembre de 2010
 
1.
Similar to a cougar, a Grand cougar could be the mother of a cougar. Only the bravest cougar hunters go after Grand Cougars
Dude, the bar was so packed with cougars last night, why did you take that grand Cougar home?
Por bikz 16 de junio de 2009