Green’s Dictionary of Slang

(US) Dallas, Texas.

1971–2		C. Shafer ‘Catheads [...] and Cho-Cho Sticks’ in Abernethy Bounty of Texas (1990) 203: D- town, n. – Dallas, Texas.
1996		UGK ‘Ridin’ Dirty’ 🎵 Uh, big D-Town, know what I’m talkinbout, ridin dirty.