This term has multiple definitions: 1. Poor quality marijuana that has very poor effects, and 2. a mix of crack, PCP, or meth and oregano that tweaked out dealer on the street corner tries to sell you.
1. Man, this is nigger weed, I´ve smoked three joints and don´t feel a thing! 2. I made the mistake of buying nigger weed last night and I was tripping balls.