IDIOMS

fresh off the boat

(idiomatic, usually derogatory) Newly arrived from a foreign place, especially as an immigrant who is still unfamiliar with the customs and language of his or her new environment.

Example: 2005, Lev Grossman, "They Built This City (book review)," Time, 20 Mar.:
  Metropolis is the story of a harmless, hapless, nameless young German immigrant, fresh off the boat in 1860-something, who has a knack for naively stumbling into complicated plots through no fault of his own.