From nice to deadly like a bad bag of D
“D” normally means drugs, dope — heroin to be specific: whereas you may get your hopes up that your trip is going to be awesome, if the drugs are tainted you’ll have a terrible time or possibly die
Most likely Heroin, a bad bag is a hot shot which will kill
Following the preceding lines, Jay continues with this prolonged sexual innuendo throughout the entire verse; Sexual activity could be a thrill until it turns deadly, possibly STD’s. A bad bag of ’D' is a reference to dick(penis)… a broken condom(bag) exposes you to any and every disease or reason you used the condom in the first place.
To help improve the meaning of these lyrics, visit "Cashmere Thoughts" by Jay Z Lyrics and leave a comment on the lyrics box