Pronunciation: [lan-YAP; LAN-yap]
Used primarily in southern Louisiana and southeast Texas, the word lagniappe refers to an "unexpected something extra." It could be an additional doughnut (as in "baker's dozen"), a free "one for the road" drink, an unanticipated tip for someone who provides a special service or possibly a complimentary dessert for a regular customer.
From The Food Lover's Companion, Fourth edition by Sharon Tyler Herbst and Ron Herbst. Copyright © 2007, 2001, 1995, 1990 by Barron's Educational Series, Inc.