Woo Girls

A Woo Girl is a type of young woman, who like the cuckoo bird or the Whip-Poor-Will, gets her name from the signature sound she makes. A woo can be elicited from a certain song coming on the jukebox ("Sweet Home Alabama" plays); to half-priced shots; from a ride on a mechanical bull; to, well, pretty much anything.
--
Barney: The world absolutely needs Woo Girls. If there were no Woo Girls, there would be no Girls Gone Wild, no bachelorette parties, no Las Vegas poolside bars. All the things that you hold dearest, Lily, would be gone.
Lily: Those are none the things...
Barney: The souvenir shot glass industry would collapse. So would the body glitter industry... and the stretch Hummer rental industry. Tiny cowboy hats would be worn only be worn by tiny cowboys. And when "Brown Eyed Girl" would come up on the jukebox, all you would hear would be silence... and "Brown Eyed Girl"... But who would woo? Lily? Who would woo? Would you? Would you... woo?
--
From How I Met Your Mother, Episode: Woooo!
Written by Carter Bays & Craig Thomas