A twink is a male individual who is teen-looking, and usually considered attractive (a Chad or Chadlite), with boyish qualities. They are typically short/average height, aging 18-24, slender with little or no body hair. This definition was likely created by the homosexual community and is still often popular amoung gay and bisexual communities.
Bicel heightcels might be able to pull such a identity off to find attraction from other bicel or gaycel males as such disposition is often highly sought in both bisexual and homosexual spaces.
Although the term is often used in homosexual circles, it can be used to describe the kind of males many teenage fangirls are into. Typical examples are male Kpop idols (see also: Changs).