A young, attractive, slim male, usually having little body hair.
A weak or effeminate man, whether gay or not.
A player (or character created by a player) in a multi-user dungeon or other roleplaying game who engages in obnoxious or abusive behaviour, especially one who uses a higher level character to give advanced equipment to one of their own lower-level characters.
From Middle English twinken, twynken, from Old English *twincian, from Proto-West Germanic *twinkōn, from Proto-Germanic *twinkōną, an augmented form (with formative *-kōną; see English -k) of Proto-Germanic *twint-. Cognate with Middle High German zwinken, zwingen, modern German zwinkern, Middle Dutch twinc, Middle High German zwinzen, zwinzern.