*cough cough* Why that nigga coughin'?
Blowing that sour diesel I ain't be here that often

from Game – Out of Towner Lyrics on Rap Genius

Meaning

Serious marijuana smokers look down on people who cough while smoking, especially when it’s some good shit like sour diesel.

Also, this is a play on words from the preceding line pairing “coffin” with “coughin'.”

To help improve the meaning of these lyrics, visit “Out of Towner” by Game Lyrics and leave a comment on the lyrics box