for his efforts in ensuring an excellent day of fun on the water sailing, some female guests served the captain a true boat drink to show their appreciation
nautical definition: an alcohlic beverage (typically with rum) served topless to the captain, crew or guests onboard a sailing vessel
"for his efforts in ensuring an excellent day of fun on the water sailing, some female guests served the captain a true boat drink to show their appreciation" What is the definition of "boat drink"?