Green’s Dictionary of Slang

1. (Aus./N.Z./US) a newly arrived immigrant or visitor; ext. as derog. term for any minority group.

1919		A. Baer Two and Three 27 Feb. [synd. col.] The East has created a lot of rough-eared chinbusters West, who were champs f.o.b. New York.
1939		H. Miller Tropic of Capricorn (1964) 73: Monica arriving at the Grand Central Station with a corpse. A corpse f.o.b. New York!
1956		H. Gold Man Who Was Not With It (1965) 87: No F.O.B.’s, C.O.D.’s, junkies, lushes, agitators.
1988		McGill Dict. of Kiwi Sl. 46/1: fob Samoan.
1989		(con. 1960s) M. Kingston Tripmaster Monkey 23: Was he hearing English wrong like any greenhorn F.O.B.?
1995		M. Dibdin Dark Spectre (1996) 6: Jamie bet Chinese people would rather commit hari-kiri or whatever it was than throw a scene like this in front of guests. Well, screw ’em, bunch of FOB’s! This is America. Deal with it.
1997		Da Bomb Summer Supplement 6: F.O.B. (n.) {Offensive, derogatory} Fresh off the boat; someone who is new to the country.
2001		OnLine Dict. of Playground Sl. 🌐 F.O.B. n. Fresh Off the Boat; word generally used for minority asian or hispanic. Term used to describe an illegal alien, or someone of other race other that cacausian. It’s a word that most teens and up are using against other minorities.
2003		McGill Reed Dict. of N.Z. Sl. 81: fob Pacific Island immigrant, meaning ‘fresh off the boat’. Second half of C20.
2012		J. Díaz This Is How You Lose Her 110: Pura [...] put her son in his FOB best.

2. (US) used adv., new, fresh, e.g. of information.

1920		A. Baer Parcel Post President 16 June [synd. col.] Here is the dope f.o.b. out of Chicago.

3. (N.Z. prison) a newly trained prison officer.

2001

D. Looser Boobslang [U. Canterbury D.Phil. thesis] 72/1: fob n. a new prison officer recently completed his or her training.