Think I should hit decline
I'm numb faced while I'm thinking bout suicide

from Kid Cudi (Ft. Mary J. Blige) – Don't Play This Song Lyrics on Rap Genius

Meaning

Cudi’s saying that he’s high on cocaine (which is why his face is numb) and thinking about his life when his mom calls. But cause he’s so messed up and depressed, he doesn’t want to answer and talk to her, so she won’t know

To help improve the meaning of these lyrics, visit "Don't Play This Song" by Kid Cudi (Ft. Mary J. Blige) Lyrics and leave a comment on the lyrics box