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’ [lyrics] I’m in the lab, chiefin hay, comin up with gold.
Online Sl. Dict. [Internet] chief out v 1. to smoke marijuana; GET HIGH. (‘Later, I’m going to chief out.’).
Custom Made Gangstas ‘Hydro’ [lyrics] The grass we chief, man, it’s ten steps ahead of ya.
Twitter 10 Apr. [Internet] @bbraddmartin he blazes it bro, me am him just chiefed a blunt.