Lagniappe
A popular term in Louisiana usually tied to the gifting of something small—or a little something extra—with a purchase.
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Project Gutenberg
Lagniappe as depicted in Mark Twain's "Life on the Mississippi," 1883.
Lagniappe is a word used in Louisiana to refer to a free giveaway or a small gift added to a purchase or experience as a little something extra. For example, when a bakery gives away an extra cookie or treat with the purchase of a cake or box or pastries, they call the custom “lagniappe.”