The "healthy" alternative to a "burger" or chicken clumps; a sandwich comprised of some sort of a fried fishy patty on a bun with an enormous dollop of mayo-AYO, available at McDonald's.
by Stu E. December 24, 2007
That sandwich at McDonald's purportedly made of "fish"...my guess is it is white rubber with mayo on bread. Also known as the Fillet-o-Fish.
by gourmet consumer December 13, 2007