tweak

noun

A sharp pinch or jerk; a twist or twitch.
a tweak of the nose
A slight adjustment or modification.
He is running so many tweaks it is hard to remember how it looked originally.
Trouble; distress; tweag.
A prostitute.
An additional input to a block cipher, used in conjunction with the key to select the permutation computed by the cipher.

verb

To pinch and pull with a sudden jerk and twist; to twitch.
to tweak the nose.
To adjust slightly; to fine-tune.
If we tweak the colors towards blue, it will look more natural.
To twit or tease.
To abuse methamphetamines, especially crystal meth.
To exhibit symptoms of methamphetamine abuse, such as extreme nervousness, compulsiveness, erratic motion, excitability; possibly a blend of twitch and freak.
To exhibit extreme nervousness, evasiveness when confronted by law enforcement or other authority (e.g., customs agents, border patrol, teacher, etc.), mimicking methamphetamine abuse symptoms.

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