cougar
n.— «Cougar: slang for an older woman on the prowl preferably for a younger man. Seems to have originated out west and, according to a highly questionable website, has been attributed to Canadian origins.…A friend of mine recently found herself unencumbered of full time male companionship. Amongst our social circle, the term cougar has been bandied about now that she is free to explore other options.» —“The Suburban Cougar—Dating Reflections” by suburbancougar The Suburban Cougar Mar. 14, 2005. (source: Double-Tongued Dictionary)