Scottish National Dictionary (1700–)
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First published 1974 (SND Vol. IX).
This entry has not been updated since then but may contain minor corrections and revisions.
¶TWINK, v. To twitch, jerk (Sc. 1911 S.D.D.).
[The source has not been traced. Phs. an extended usage of Eng. twink, to blink, to twitch the eyelid, or a mistake for Twirk.]