Green’s Dictionary of Slang

Fed n.

also fed
[abbr.]

1. (US) a Federalist.

Mass. Centinel 31 Dec. n.p.: Antis, and Feds, usurp the glory, So long enjoy’d by Whig and Tory [DA].
[US]T.G. Fessenden Democracy Unveiled 143: Your friends, the Feds, are much delighted. [Ibid.] 148: Demo’s and Feds would all be merry.

2. (US) a supporter of the Northern cause in the US Civil War, fighting for federal rather than states’ rights.

[US]Army Police Record in Annals of the Army of the Cumberland 520: The Feds are coming!
[US] [letter] Maj. Gen. A.J. Smith in Hudson Humor of the Old Deep South (1936) 479: ’Tis certain, Miss Clemmie, whether Fed or Confed, / In the plain course of nature you’re destined to wed [...] If Feds and Confeds will cease this vain strife, / And leave a man living to make you his wife.
N.Y. Dramatic News 23 Nov. 3/3: What became of that comedy of yours which I produced under the title of Feds and Confeds? [DA].
[UK] (ref. to US Civil War) J. Ware Passing Eng. of the Victorian Era 128/2: Fed (Amer., 1860–65). Abbreviation of federal, given to themselves by the Northerners, whereupon the Southerners cut themselves down to Confeds, and met the Northerners at that.

3. (US, also Federales) a member of the Federal Bureau of Investigation; often in pl.

[US]A. Stringer Door of Dread 53: Seein’ Kestner and yuh’d told me the Feds had ev’rything fixt, I give him the glassy eye and sez, ‘Nix, my honey-boy, nix!’.
[UK]P. Cheyney Dames Don’t Care (1960) 60: The Feds are goin’ to take it for granted that she pulled the counterfeitin’ too.
[US]J.K. Butler ‘Saint in Silver’ in Goulart (1967) 64: The feds gave him seven years on a narcotics rap.
[US]Kerouac On The Road (1972) 242: His ticket was bought by the feds, his destination the parole.
[US]C. Himes Cotton Comes to Harlem (1967) 66: Why don’t the Feds knock him off? Who’s he paying?
[US]E. Torres Carlito’s Way 22: Not to forget the hole the feds was diggin’ under the floor.
[US]N. Pileggi Wiseguy (2001) 54: The feds claimed they had made over three million dolllars.
[US]S. Morgan Homeboy 21: Had a father I never told you about once played rabbit from the Federales. [...] The feds get sicked on you and those boys don’t know quit.
[US]C. Hiaasen Skinny Dip 330: They can kiss my ass them feds.
[US]A. Steinberg Running the Books 61: He and his buddies had been rounded up [...] by the Feds.
[US]Rayman & Blau Riker’s 186: After like seventeen hours, the feds come question me.

4. (Aus.) a federal police officer.

[Aus]D. Ireland Glass Canoe (1982) 81: Bloody feds [...] Feds. Wouldn’t feed ’em. If my dogs behaved like that I’d shoot ’em.
[Aus]P. Temple Bad Debts (2012) [ebook] Made out he was a fed of some kind.
[Aus]P. Temple Dead Point (2008) [ebook] You think I’m such a dumb cunt I’m dealin while I’ve got the fucken Feds on my fucken hammer?
[Aus]L. Redhead Rubdown [ebook] I have to get to work [...] contact immigration and the feds.

5. (Aus.) a member of the Federal government.

[Aus]Bulletin (Sydney) 11 Apr. 14/1: At themoment they’re leaving it all to Joh, whom they can trust to se that the Feds don’t pull any swifties.
[Aus]Sydney Morning Herald 11 Dec. 6/5: If you can’t blame the Feds, blame your predecessor.

6. (US campus) money, i.e. Federal dollar bills.

[US]College Sl. Research Project (Cal. State Poly. Uni., Pomona) 🌐 Fed(s) (noun) Money.

7. (Irish/UK black/teen, also federales) a police officer, often in pl.

[UK]‘Q’ Deadmeat 342: ‘Do you know what she did [...] ?’ ‘Called the Feds.’.
[UK]Shystie ‘Bank Robbery’ 🎵 When the Feds come through I’m going to start a war.
[UK]A. Wheatle Dirty South 2: Fuck knows where they [i.e. crackhouses] all are now since the Fed clamp down.
[UK]Guardian 8 Aug. 🌐 We don’t need pussyhole feds to run the streets and put our brothers in jail so tool up.
Harlem Spartans ‘Teddy Bruckshot’ 🎵 Chat to the fed, no way, that's dead / Like, how could you chat to the pigs?
[Ire]P Howard Braywatch 195: ‘Which service do you require?’ And I’m like, ‘The focking Feds! My cor’s been stolen!’.
Central Cee ‘Dun Deal’ 🎵 The door just knocked, my heartbeat drop, I know federales watch.