Green’s Dictionary of Slang

bitch n.3

[bitch n.1 (2a) + bitchweed under bitch n.1 ]

1. (US drugs) one who knowingly dispenses unpleasantly adulterated varieties of marijuana.

Stoners’ Dict. 🌐 Bitch [US] – One who knowingly dispenses bitchweed or nuke.

2. the main vein as used by heroin addicts.

[UK]Guardian G2 26 Jan. 🌐 Among heroin users, the major artery for injection is known as ‘your bitch’, hence the Prodigy’s most famous track Smack My Bitch Up.