"a sweet hint of ganja about him; "
Jamaican ganja
Public DomainJamaican ganja - Credit: Alphakaya

 Ganja is the word used by the Rastafarian community for cannabis (marijuana). It derives from the Sanskrit word for hemp (the cannabis plant).

There are an enormous number of slang terms for various forms of cannabis; more old-fashioned ones, which were still in use in the early 1980s, include pot, weed, dope, grass and hash.

Marijuana drug slang dictionary;

Popular slang terms for marijuana.