Webster's Revised Unabridged Dictionary · 1913

Tweak

Tweak , transitive verb

[Old English twikken, originally the same word as twicchen; compare LG. twikken. See Twitch.]

To pinch and pull with a sudden jerk and twist; to twitch; as, to tweak the nose. — Shakespeare

Tweak , noun

1.
A sharp pinch or jerk; a twist or twitch; as, a tweak of the nose. — Swift
2.
Trouble; distress; tweag. [Obsolete]
3.
A prostitute. [Obsolete] — Brathwait