The fleur-de-lis shows a stylized lily with three pointed petals. It is associated with French history, royalty, heraldry, scouting, and places such as New Orleans and Quebec.
People use it to signal French or Louisiana identity, a regal aesthetic, or support for the New Orleans Saints. It appears less often in ordinary conversation, so it usually reads as a badge, decorative mark, or regional symbol rather than an emotional reaction.
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