2.To work obsessively or compulsively on something.
3.To adjust something.
4.To be way wrong about something
2.I was tweakin on my room for like 4 hours
3.I was just Tweakin the carb on my truck
4.you think the Boston Celtics are the best team ever..man your tweakin.
2) to be hyperactive.
2) ADD/ADHD, natural high, sugar high, caffeine high can cause tweakin (hypetactivity) where you'll just be all over t he place moving fast.
when someone is hyperactive it doesnt mean they are under the influence of methamphetamine where meth high causes similar behaviour but is a different kind of hyper.
2. Someone could be called one for talking alot, pacing or moving alot or doing a task with an unusual amount of persistence, most of the time at unusual times late at night/early morning
3. You wont catch this person sleeping or eating. all though the food still looks good..