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Lagniappe \La*gniappe\, Lagnappe \La*gnappe"\, n. [Etym.
uncertain.]
In Louisiana, a trifling present given to customers by
tradesmen; a gratuity.
Lagniappe . . .is something thrown in, gratis, for good
measure. --Mark Twain.
lagniappe
n : a small gift (especially one given by a merchant to a
customer who makes a purchase)