Once again, another gem from urbandictionary.com.
I do believe that John Della Bosca might be a "Manther". I don't believe there is any shame attached to it unless you are hanging around school gates. Enjoy!
The male version of a cougar; an older man who preys on younger women.
e.g."Mr. Smith is such a manther, did you see his new girlfriend? She's got to be less than a quarter of his age. Awesome."
"That Smith geezer was hitting on my granddaughter at the banquet. What a hideous manther."