Hat money

HAT MONEY, mar. law. The name of a small duty paid to the captain and mariners of a ship, usually called primage. (q.v.)

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.
References in periodicals archive ?
And the current run of form - - supplemented by yesterday's 2-1 win over Everton with goals from Olivier Giroud (right) and Laurent Koscielny - has seen Wenger's hat money will be available to him if he wants to strengthen his squad further during the January transfer window.