A flea market is a type of bazaar, usually outdoors, where vendors of secondhand and discount goods sell their wares. But why flea market? The term probably reflects the influence of two linguistic strains: In 18th-century New York City, the Fly Market took its name from a similar-sounding Dutch word. Later, English speakers adopted the French phrase for a similar type of market, marche aux puces, literally meaning market of the fleas. This is part of a complete episode.