Through the bub-bling water
Is Makin' it pure so I got ta',

from Cypress Hill – Hits From the Bong Lyrics on Rap Genius

Meaning

The water in the bong cools the hot smoke (and perhaps removes a modicum of tar or whatever) resulting in a smoother, more pleasant, more potent hit (THC isn’t water-soluble, so drinking bong water won’t get you high)

To help improve the meaning of these lyrics, visit “Hits From the Bong” by Cypress Hill Lyrics and leave a comment on the lyrics box