\Twink\, v. i. [OE. twinken. See {Twinkle}.]
To twinkle. [Obs.]
\Twink\, n.
1. A wink; a twinkling. [Obs.]
2. (Zo["o]l.) The chaffinch. [Prov. Eng.]
 
Computing Dictionary
Definition:
/twink/ [UCSC] Equivalent to read-only user. Also reported on the usenet group soc.motss; may derive from gay slang for a cute young thing with nothing upstairs (compare mainstream "chick").