Uhm finsh the lyrics to the song really do it dont look up

Gotta concentrate, against the clock I race
Got no time to waste, I'm already late, I got a marathoner's pace
Went from addict to a workaholic, word to Dr. Dre in that first marijuana tape
Guess I got a chronic case
And I ain't just blowin' smoke, 'less it's in your mama's face
I know this time Paul and Dre, they won't tell me what not to say
And though…