cou·gar [koo-ger]

-noun.
A 40+ year old female who is on the "hunt" for a much younger, energetic, willing-to-do-anything male. She may be found in the usual hunting grounds: nightclubs, bars, beaches, etc. Cougars generally feed and then continue hunting, as they enjoy role reversal.

Cougars are gaining popularity amongst young men who are willing to be bait. Now they can be located with an iPhone app. Ta-da!