Neologism: puma

Puma: (noun) an attractive woman in her 20's or 30's who likes to date/mate younger men. This is not Felis concolor, the large North American feline also referred to as a "mountain lion"; although the predatory nature and beauty of that cat are not coincidental.

I first heard this term in February, when recording a young man in his 20's who had encountered a so-called puma. He named her as such after his mention of her older age led one of his listeners to question whether he had gone out with a cougar (a woman in her 40's who pursues younger men).