Lagniappe: Turkish oil wrestling

A lagniappe is a small gift given to a customer by a merchant at the time of a purchase (such as a 13th doughnut when buying a dozen), or more broadly, "something given or obtained gratuitously or by way of good measure." The word entered English from the Louisiana French adapting a Quechua word brought into New Orleans by the Spanish creoles. It derived from the South American Spanish phrase la yapa (referring to a free extra item, usually a very cheap one). Although this is an old custom, it is still widely practiced today in Louisiana. Street vendors, especially vegetable vendors, are expected to throw in a few green chillies or a small bunch of cilantro with a purchase.

Or maybe a bit of oil?