Green’s Dictionary of Slang

(US black teen) bad, fake.

2002		Teen Lingo: The Source for Youth Ministry 🌐 bammer n. The cheaper, brown leaf marijuana. 2. something or someone who is NOT good. ‘Man, that CD is bammer!’.
2003		A. Newitz ‘Bay Area Sl.’ on Berkeley University Amer. Studies 102 Course Website 🌐 Bammer – Bad, Phony. Made infamous by RBL’s classic ‘Don’t Give Me No Bammer Weed’.