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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.
I don't feel so good...I shouldn't have ordered that McFishwich for lunch!
by Stu E. December 24, 2007
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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.
Pick me up a McFishwich at Mickey-D's, I need to puke!
by gourmet consumer December 12, 2007
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