Green’s Dictionary of Slang

1. a glutton, a fat person.

1987		Eble Campus Sl. Spring 6: porker [...] also oinker.
1992		D. Burke Street Talk 2 I 133: Oinker [...] one who eats like a pig.

2. an unappealing man.

1982		S. King Different Seasons (1995) 498: Back into the sty with the rest of the male chauvinist oinkers?
1986		S. King It (1987) 517: She told me it was her big chance and I had to be the most insensitive male chauvinist oinker in the United States to be dragging my feet.
2008		Sun. Indep. (S.Afr.) 27 Jan. 12: Gordin, being a male chauvinist oinker of the worst sort [...] was somewhat taken aback.
2023		R. Milward Man-Eating Typewriter 214: All sort of imaginary scoundrels: oinkers, eagles, periwigged sharpering-pops with googly ogles [etc].

3. an ugly young woman.

1981

National Lampoon Nov. 18: If that doesn’t send her diving for the compact mirror, you’re hooked up with an oinker! [HDAS].

4. (also oinkie) a police officer.

1982		S. King Running Man in Bachman Books (1995) 592: I hate them fuckin’ oinkers worse than anyone.
1999		R.G. Barrett Wind & Monkey (2013) [ebook] ‘Ohh what else could you do with those two oinkers standing there? I had to stir the pricks up’.
2024		J. Meades Empty Wigs (t/s) 773: [I]it was the area’s most prestigious dogging rendezvous with five stars on TripAdvisor... that was before the oinkies began to take an interest.