IPA: /læŋˈjæp/
KK: /lænˈjæp/
A small extra gift or benefit given to someone, often by a seller to a customer, as a way to show appreciation or goodwill.
When I bought the cake, the baker gave me a lagniappe of cookies as a surprise.
Lagniappe originates from the Louisiana Creole and Louisiana French term 'lagniappe' (from Spanish 'la ñapa', meaning the gift). It refers to a little extra gift or bonus given to a customer by a seller, especially in markets.
Think of a little 'gift' ('la ñapa') that you receive as a bonus when you make a purchase — that's what lagniappe means.