lagniappe

noun

Etymology: Borrowed from Louisiana French lagniappe, from Spanish la ñapa, a variant of yapa (“small gift or additional quantity given to a valued customer”), from Quechua yapa (“addition, increase, supplement; lagniappe”), yapay (“to add, to increase”).

1. 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.”