context: "[T]he Twilight phenomenon activates ... intense [negative] passions among the Comic-Con crowd ... it's telling that many of the same folks who pitch a fit over a couple of twinky, sparkly boy vampires ... hav[e] no problem with ... naked girl vampires and sexually depraved demons ..."
twinky (see twink)
twink: An attractive, boyish-looking, young ... man. The stereotypical twink is 18-22, slender with little or no body hair, often blonde ... A twink is the gay answer to the blonde bimbo cheerleader.
The definition is via the Urban Dictionary. There is no definition for twink at dictionary.com or at merriam-webster.com (unless it's hiding in their "unabridged" version).
I first heard “twink” not long after I came out, age twenty, and was at my twinkiest, I suppose. This was mid-80s. Not long after I heard it for the first time I think an older gay man (30s? 40s?) called me a twink and I felt insulted. Or maybe he called a friend of mine a twink. I don’t really remember. But “twink” didn’t sound like a compliment to me. I wasn’t really sure what it meant, but it sounded belittling, dismissive. Was it derived from “twinkle”? That sounds like a version of a gay slur. (Or a camp term of endearment?)
When at some point I wondered aloud about the word’s etymology, I was told it came from the Hostess Twinkie, which is long and firm and full of cream. That, at least, was funny.
So here it is twenty-five years later and for the first time I come across “twink” in a non-gay context. The author of this book on the San Diego Comic-Con is married to a woman, but clearly his life experience has been informed by gay culture. Although he’s my age he takes for granted that his readers will know what “twinky” means. It’s not a typo. He didn’t intend to write “twinkly.” You wouldn’t say, “twinkly, sparkly.” That would just be redundant. And the shirtless, hairless torsos of the youthful stars of the Twilight series display the qualities of twinks so the word is apropos. Nor would it be a surprise that the sexual objectification of the idealized youthful male body might make the nerdy straight boys of Comic-Con uncomfortable.
source: Comic-Con and the Business of Pop Culture: what the world's wildest trade show can tell us about the future of entertainment by Rob Salkowitz