Greenhorn | Webster's Dictionary of the English Language

greenhorn
A novice on the town, an undebauched young fellow, just initiated into the society of bucks and bloo...

Dictionary of The Vulgar Tongue by Francis Grose
greenhorn
A raw youth, easily imposed upon, unacquainted with the world.--Todd. If by mistake, at Washington,...

Dictionary of American Words And Phrases by John Russell Bartlett.