Doctor Green; i.e. grass: a physician, or rather medicine, found very successful in curing most disorders to which horses are liable. My horse is not well, I shall send him to Doctor Green.GREEN Young, inexperienced, unacquainted; ignorant. How green the cull was not to stag how the old file planted the books. How ignorant the booby was not to perceive how the old sharper placed the cards in such a manner as to insure the game.
GREEN
Meaning of GREEN in English
Slang English vocab. Английский сленговый словарь. 2012