lagniappe

noun

1. (Louisiana, Trinidad-and-Tobago)An extra or unexpected gift or benefit, such as that given to customers when they purchase something.

   “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?"”

   “[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, […]”