Gratuity

• Something for good measure
• Tip in gale at sea requires loading of program

Wikipedia Word definitions in Wikipedia
Lagniappe - "Something Extra for Mobile" - is a weekly alternative newspaper published in Mobile, Alabama . Lagniappe was first published bi-weekly on July 24, 2002 under the guidance of co-publishers Ashley Toland and Rob Holbert, who now serve as editor ...

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Lagniappe \La*gniappe\, Lagnappe \La*gnappe"\, n. [Also spelled lagnappe . Etym. uncertain.] In Louisiana, a trifling present given to customers by tradesmen; a gratuity. Lagniappe . . .is something thrown in, gratis, for good measure. --Mark Twain. A tip ...

WordNet Word definitions in WordNet
n. a small gift (especially one given by a merchant to a customer who makes a purchase)

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
"dividend, something extra," 1849, from New Orleans creole, of unknown origin though much speculated upon. Originally a bit of something given by New Orleans shopkeepers to customers. Said to be from American Spanish la ñapa "the gift." Klein says this ...