I think that's kinda like twerking , but for females who don't have Kardashian sized butts. I know stuff about stuff.
When something is just a little bit off, and you don't need to do much to fix it. Those of us into DIY repairs know how well that works!

Tweak is the noise you hear during a hurricane of stop signs go back and forth
Tweak is the action you perform on an alligator's tail if you're trying to attract his attention.

You "tweak and peak" a CB radio. :0)