And they nose and cough snot up
Mucus in hot water

from Dr. Dre (Ft. Eminem & Xzibit) – What's the Difference Lyrics on Rap Genius

Meaning

bubbles being released by the atempts to breathe underwater releasing mucus and snot from the lower throat and nose

To help improve the meaning of these lyrics, visit “What's the Difference” by Dr. Dre (Ft. Eminem & Xzibit) Lyrics and leave a comment on the lyrics box