The Chronic

Dr. Dre
Nuthin' But A G Thang
Dre is about to sing his verse; he is being called to the mic. Creeping is also driving and a phantom is a type of rolls-royce, so his flow or style of rap is smooth like a ride in an quality vehicle. "approach in a smooth, ghostlike manner"
liberty
Nuthin' But A G Thang
Gotta break 'em off somethin' means to share the wealth or to give something meaningful to someone else. In the context of this particular part of the song, it means a very good song with a strong beat.
wetalkinboutpra...
Nuthin' But A G Thang
WEED
The Notorious D.I.P.
Nuthin' But A G Thang
You're acceptable enough to me to get a good chunk or piece of the weed.
awhite99mustang
Fuck Wit Dre Day
Actually, "mark" is a derrogatory term. Dre is saying just by affiliation, he was a loser.
btodd
Nuthin' But A G Thang
With all due respect, 'clockin a grip' doesn't have anything to do with guns. 'A grip' is slang for 'a lot.' So, what he's saying here is that he's making (clockin') a lot of money as a pimp. The Dolemite bit is pretty spot on though.
drybones
Nuthin' But A G Thang
Fading means falling down in the top music charts until you're no longer signed for more records.
foxmajik
Let Me Ride
because of all the criminal activity Dr. Dre witnessed in Compton California, it was not unusual for the people of his neighborhood to find corpses of people who were murdered on Greenleaf Boulevard just north of Interstate 91
bill
Nuthin' But A G Thang
boxer Evander Holyfield's nickname was "Real Deal Holyfield"...he is saying that he is even realer (more honest and tells it how it is) than that
aob123
Nuthin' But A G Thang
good weed has a very distinct almost stinky smell. so, he is saying he broke off a piece of good quality marijuana to get ready to smoke
aob123