Putting ice into your warm cocaine and baking soda concoction to cool it it down, and cause coagulation between the elements included. aka cooling down soon to be crack/base. It can also be considered whipping ice into the concoction, much like you would whip cake batter.
Im shitting bricks, nigga. My momma caught me icewater whippin and i couldnt lie to her cuz it smelled hella base, nigga.