Green’s Dictionary of Slang

1. (US campus) an attractive man.

1980

Eble Campus Sl. Fall 4: hubba – attractive, sexy man [...] ‘Robert Redford – what a hubba!’.

2. (drugs) crack cocaine [fig. use denoting its energizing effect].

1986		S.F. Chronicle 2 July 6: (Factiva) Cocaine sold as free-base is called ‘hubba’ or ‘ready rock,’ they said. When it is mixed with marijuana and smoked, it becomes ‘fry daddy’ or ‘chewy.’ When you go out to buy cocaine, you’re on ‘a tweek mission.’.
1988		Newsweek 25 Apr. 64: Smoking hubbas, or rocks of crack.
1991		W.T. Vollmann Whores for Gloria 139: Hubba – Cocaine processed into smokeable ‘crack’.
2001		ONDCP Street Terms 12: Hubba — Crack Cocaine.