lagniappe /LAN-yap/. noun. A tip, a gratuity or gratuitous addition, something given above what has been earned.
“And more than this, than the revenge, as lagniappe to the revenge as it were, this nosegay of an afternoon, this scentless prairie flower which will not be missed and which might as well bloom in your lapel as in another’s” (William Faulkner, from Absalom, Absalom)
“We picked up one excellent word—a word worth travelling to New Orleans to get; a nice limber, expressive, handy word: ‘lagniappe’. They pronounce it lanny-yap.” (Mark Twain, from Life on the Mississippi)
“Lagniappe, usually attributed to the French of New Orleans, in fact originated among the Kechuan Indians of Peru as yapa. The Spanish adopted it as ñapa. The French then took it from the Spanish and we from the French.” (Bill Bryson, from Made in America)
“He pays off Bodine, full price, overriding Bodine’s offer to prorate for what’s missing. ‘Call it a little lagniappe, goodbuddy, that’s Duane Marvy’s way o’ doin’ thangs…'” (Thomas Pynchon, from Gravity’s Rainbow)