banyan dayWiktionary 原文英美词源说明According to the OED, the term is borrowed from the Banyans in the East Indies, a caste that ate nothing that had life.释义名词noun1(dated, UK, nautical, idiomatic) In British naval tradition, a day of the week when galley kitchens served no meat on board ship.2(UK, nautical, idiomatic) A picnic or cookout for the ship's crew.