A type of corset or supportive undergarment, often branded as 'Gossard' from a famous corset manufacturer.
Named after the Gossard company, a major corset and intimate apparel manufacturer founded in the early 20th century, whose brand name became genericized for their style of supportive garment.
Like how people say 'Kleenex' for any tissue, 'Gossard' became shorthand for a whole category of undergarments in the mid-20th century—it's a rare example of a brand name that succeeded so well it almost replaced the common word.
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