Green’s Dictionary of Slang

(US black/campus) drunk or intoxicated with a drug.

1989		P. Munro Sl. U.
1997		K. Kainulainen ‘University Euphemisms in Calif. Today’ 🌐 Part of the euphemistic expressions in university students’ language have something to do with drinking, [...] ‘Bobo’, ‘blasted’ and ‘to be in the ditch’ are all used instead of ‘drunk’.
2000		R. Antoni Grandmother’s Erotic Folktales 104: The other thing about drinking alcohol is not only does it make me a little bit more emotional [...] but bobo as a bubulups too!
2004		A. Mansbach ‘Crown Heist’ in Brooklyn Noir 124: Those bobo yardie motherfuckers.