Thick in the game, D's knew my first name

from The Notorious B.I.G. – Everyday Struggle Lyrics on Rap Genius

Meaning

He was so into the drug dealing game that D’s (short for DT’s or undercover cops) knew who he was. Meaning they were probably tapping his phones etc. looking for evidence to convict him or at least get a warrant.

To help improve the meaning of these lyrics, visit “Everyday Struggle” by The Notorious B.I.G. Lyrics and leave a comment on the lyrics box