to cougar Share definition Flag An older woman flirting with or having sex with a significantly younger man. Used as a verb.What a cougar does to her victims. Jimmy got cougared last night.Fifi is cougaring the new guy.Amelia is getting ready to cougar Ryan. to cougar by Sammylynn April 29, 2010 0 0 Get merch Get the to cougar mug. Buy Now — $32.95 See more merch