Definition of "tweaker" [tweaker]

• A person who tweaks something. (noun)
• A tool for making small adjustments. (noun)
• A person addicted to methamphetamines. (noun)

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• "By Mike Jones Soundbooth had a shaky start to life, seemingly being designed as an audio 'tweaker' specifically for those who know nothing about audio production (Flash and website designers seemed to have been the primary demographic)."
• "If you're more of a "tweaker" of factory or user patches, then the parameters that affect the entire instrument may be more your style."
• "The Quarter was about to curl up and take a catnap—except for Bourbon Street, party jamboree and flesh-fest central, twenty-four/seven, and as wide awake as a lap-dancing tweaker go-juiced to the eyebrows."