Guess who's back?
Still smell the blow in my clothes

from Jeezy (Ft. Jay Z) – Go Crazy (Remix) Lyrics on Rap Genius

Meaning

You can still smell the cocaine-dust in my clothes because I was cooking crack in the kitchen

This is an allusion to Jay-Z’s opening to his guest verse on Scarface’s “Guess Who’s Back”:

Guess who’s bizzack, you still smell the crack on my clothes
Don’t make me have to relapse on these hoes

To help improve the meaning of these lyrics, visit “Go Crazy (Remix)” by Jeezy (Ft. Jay Z) Lyrics and leave a comment on the lyrics box