Lagniappe

Lefe had been successful, and was supposed to have amassed quite a "pile," which he was very loth indeed to part with; and when he lost, if the money were not absolutely staked, would usually put off the winner with some old horse that he had fixed up for sale, or a dubious note that he had received as "lanyappe," (Anglice, boot money.)

Lanyap. Something over and above. Louisiana.

We have a custom here among children (and one often sought to be made availing by some of larger growth), that when anything is purchased, a Lagnappe (something thrown in), is expected, and demanded as a right. And since "Jesus died and paid it all, / All the debt we owe." […] may not He claim for His Lagnappe, on the resurrection morn, these living gems [children], who wait "to be clothed upon with their house which is from Heaven?"

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. […] It has a restricted meaning, but I think the people spread it out a little when they choose. It is the equivalent of the thirteenth roll in a "baker's dozen." It is something thrown in, gratis, for good measure. […] 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; gives the servant a cheap cigar or a spool of thread, gives the governor – I don't know what he gives the governor; support, likely.

[T]he most peculiar is the institution known as Lagniappe (pronounced Lan-yap). Lagniappe is something given to the purchaser in a retail store, a bribe to secure his future patronage. It is a custom extending back to time immemorial, […]

They have a stranger thing than the lottery in New Orleans, and that is the word "lagniappe." "Take that for a lagniappe" (pronounced lan-yap), says a storekeeper as he folds a pretty calendar into the bundle of stationery you have purchased.

Call it a little lagniappe, goodbuddy, that's Duane Marvy's way o' doin' thangs.

The US played the deregulation card as a means to keep the rampant Japanese economy in check, and in the 1990s began serving up advantages and lagniappes to Japan's neighborhood rival, China, strategically setting the two Asian powers against each other.