improve (a mechanism or system) by making fine adjustments to it
engineers tweak the car's operating systems during the race
become or cause to become agitated or excited, typically from taking amphetamines or another stimulant
I just about went crazy yesterday—I was totally tweaking out
caffeine is a natural mood elevator but if you're stressed to begin with it can kind of tweak you out
a fine adjustment to a mechanism or system
no tweaks were required