A trifling article added gratis to a purchase in shops or markets to encourage custom; any complimentary present from a dealer to a customer: as, a turkey sent at Christmas for lagnappe.(noun)
The Century Dictionary (Public Domain)
Use "lagnappe" in a sentence
"Out of it comes their lagnappe for making a journey to the store."
"Hayden had won in his dice-throwing and Fate took defeat handsomely, granting him his desires and throwing a favor or two for lagnappe."
"In all his tracks followed the hooded bread-cart, with its light-weight loaves for worthless money and with only the staggering news for lagnappe."