It's a little bit extra for someone you give to. It promotes good will. Like thirteen (13) donuts in a " Bakers Dozen" ; or an extra piece of candy for your baby boy or girl at the grocery store. It's generosity that makes people see you as a good person.
Lagniappe צרפתי הגייה עם משמעויות, מילים נרדפות, הפכים, תרגומים, משפטים ועוד.