Dirty Dirty
n.— «Banned in 47 Countries baby from the Dirty Dirty, to your Uranus.» —“Betta who? Betta wha?” by bettrduck@aol.com (BettrDuck) Usenet: alt.rap Apr. 9, 1999. (source: Double-Tongued Dictionary)
Further reading
A flashlight doesn’t flash. It provides a steady beam of light. So why is it called a flashlight? The earliest versions lit up only briefly before the batteries gave out and required a recharge, so they were literally “flash lights...
For rock climbers, skiers, and other outdoor enthusiasts, the word send has taken on a whole new meaning. You might cheer on a fellow snowboarder with Send it, bro! — and being sendy is a really great thing. Plus: a nostalgic trip to Willa...
These are pet names for rappers’ hoods, geographically speaking: “the dirty south” and “the dirty dirty south” and for short: “the dirty dirty”.
Yes, that information is already imparted in the full entry linked above.