tweaker Definition

tweak
verb tweaked, tweaking

1. To get hold of and pull or twist something with a sudden jerk.

Thesaurus: pinch, squeeze, twist, nip, snatch, tug, jerk.
2. To make fine adjustments to (eg to a computer program, the workings of an engine, etc).

noun

1. An act or instance, or the process, of tweaking.

Example: It'll work if you give that button a tweak

Derivative: tweaker
noun

Etymology: 17c.