Green’s Dictionary of Slang

1. to smoke marijuana.

1993		Snoop Doggy Dogg ‘Tha Shiznit’ 🎵 I toke every day, I loc every day.
2000		Hip-Hop Connection Jan.–Feb. 54: Getting ‘loc’ed’ means to get high.

2. to become intoxicated (as a result of drug use).

1996

UGK ‘Pinky Ring’ 🎵 That coke and, marijuana got yo’ ass loc’n.