V-12, n. — Green’s Dictionary of Slang

V-12 n.

[? the automotive power of a V-12 engine]

(US black/drugs) cocaine.

1997		Mia X ‘Hoodlum Poetry’ 🎵 Some call it A1 soda, others v-12.
2007		Lil Flip ‘Fly Boy’ 🎵 All I need is v12, nigga, I can cook coke.
2012		Game ‘Ali Bomaye’ 🎵 I’m on the block like D12, I got the white, no V12.