Cocaine snowballed from gambling my rent money
Snow is slang for cocaine. Instead of paying his rent he gambled the money so he could buy more and more cocaine.
It’s not clear whether he means he gambled the money in say a casino and then invested it in coke OR he took a gamble investing his money in cocaine instead of paying his rent.
To help improve the meaning of these lyrics, visit "Cook It Down (Freestyle)" by Pusha T Lyrics and leave a comment on the lyrics box