A lagniappe is "a small gift given to a customer by a merchant at the time of a purchase", or more broadly, "something given or obtained gratuitously or by way of good measure". It can be used more ge
"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... When a child or a servant buys something in a shop – or even the mayor or governor, for aught I know – he finishes the operation by saying, – 'Give me something for lagniappe.' The shopman always responds; gives the child a bit of liquorice-root; (nb...)": Mark Twain, Life on the Mississippi (1883)