Now it turns out we may have to come up with a slightly more mature version of that term. GILF. As in grandmother instead of mother.
Mimi Kirk, a resident of the San Diego area, just won a contest held by PETA to show that vegans are not necessarily stringy haired hippies with lots of armpit hair. PETA held its beauty pageant, and Kirk was the winner. The catch?
She's 70 years old. Sure doesn't look it.

Okay, yes, I know that's a distant shot. And I'm sure they did a little photoshopping, although probably not since I can see some wrinkles around her neck.
But for a 70 year old, that's impressive. Kirk says she's been a vegan for 40 years, and if you were to ask me to guess from that picture, that's around where I'd peg her age.
And she's a cougar, too. She's shacking up with a man who is 19 years younger than her. That would make him...well, hardly a spring chicken at 51. So even though she's a cougar, she's hardly hanging out at the local high school doing her Mrs. Robinson imitation.
Anyway, I'm sure you're all familiar with Steve Carrell's 40 Year Old Virgin.
I think they might have to make a movie staring Kirk. They could call it the 70 Year Old Vegan.


Salon.com
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However I think PETA are on shaky ground. Whether or not you smoke tobacco or drink too much has way more bearing on how you appear to age than whether you eat meat.