Green’s Dictionary of Slang

chief v.2

also chief out
[? stereotyped Native American ‘pipe of peace’]

(US black) to smoke (a cannabis cigarette).

8Ball & MJG ‘No Sellout’ 🎵 I’m in the lab, chiefin hay, comin up with gold.
Online Sl. Dict. 🌐 chief out v 1. to smoke marijuana; GET HIGH. (‘Later, I’m going to chief out.’).
Custom Made Gangstas ‘Hydro’ 🎵 The grass we chief, man, it’s ten steps ahead of ya.
Twitter 10 Apr. 🌐 @bbraddmartin he blazes it bro, me am him just chiefed a blunt.