to be absolutely ON ONE. Just generally trippin',
tweakin' out, jacked up, or crazy. Not necessarily due to drugs.
Could also mean on the right amount of
drugs and alcohol to be on a whole new social level of
whacked out.
Or a legit crazy person.
“You see
Dukes rip his shirt apart on the dance floor when
0 to 100 came on last night? Homeboy was
certified.”
"Wow. Jessica getting jealous of Nick and Sarah when she's not even hooking up with him.
Certified."
