n. A middle-aged man who seeks sexual or romantic relationships with significantly younger women.
Now the Cougars have more than 20 members, including two males who have been dubbed Manthers (aka male panthers), but they’d like more, to expand their fundraising strength.
—Steve Newman, “Cougars Conquering Cancer campaign underway,” Your Ottawa Region, February 10, 2011
Undulating vineyards, juicy weather, lingering melodies and memories, charming people (cougars and manthers will be in attendance — caveat emptor).
—“A quick word: Brooke Fraser, Jason Kerrison and Jeremy Redmore,” The New Zealand Herald, February 03, 2011
2004 (earliest)
manther: A male cougar. Single, usually divorced, and at a minimum 10 years older than a cougar.
—Wes Tent, “manther,” Urban Dictionary, April 29, 2004