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(slang) an engineer's small screwdriver, used for fine adjustments
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Examples from the Web for tweaker
Historical Examples
  • I did wonder,' he said, 'whether you were such an innocent as really to believe it was a tweaker.'

  • McTurk read the papers of those years and could be trusted for general information, which he used as he used his "tweaker."

    Stalky & Co. Rudyard Kipling
Contemporary definitions for tweaker

a catapult

Word Origin

tweak 'to hit with an object from a catapult' + -er

Usage Note

slang's 21st Century Lexicon
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