Green’s Dictionary of Slang

1. (US gay) a young, inexperienced homosexual man.

1972		B. Rodgers Queens’ Vernacular.
1978		L. Kramer Faggots 367: Feathered Orientals, high-heeled Brazilian blueberries, twinkling twinkies.
1989		H. Rawson Dict. of Invective (1991) 397: twinkie, twinky [...] a homosexual.
1992		Bentley & Corbett Prison Sl. 61: Twinkie A passive homosexual.
2003		Time Out N.Y. (11th edn) 288–9: Let our gay glossary help you keep everyone...straight. [...] TWINKIES.

2. a young (underage) sex object, whether male or female and seen as suitable for exploitation.

1982		A. Maupin Further Tales of the City (1984) 73: I thought you gentlemen could use a litle refreshment before the twinkies invade.
2000		T. Blacker Kill Your Darlings 246: Only a fucking pervert would do anything to a little twink or a pre.
2006		Observer Mag. 15 Jan. 36/3: He claimed he had enjoyed 2,000 of the rent boys he called ‘twinkies.’.

3. anyone considered odd or eccentric.

1989		H. Rawson Dict. of Invective (1991) 397: twinkie, twinky [...] a weird person.
1990		S. Morgan Homeboy 195: You could blow in one of that Twinkie’s ears and the other would whistle.

4. the penis.

1988		W.D. Myers Fallen Angels 5: ‘[T]he worst thing that’ll happen to you is that you catch a social disease in downtown Saigon that’ll rot your twinkie off’.
1994		Insane Clown Posse ‘Murder Go Round’ 🎵 on Ringmaster [album] You’re brinky, you’re dinky, you suck my twinkie / I don’t give a fuck if you call me a clown.