Green’s Dictionary of Slang

jones n.1

[the common family name; its link to craving remains unexplained; note HHC Dec. 1999: ‘According to our colleagues at the Online Rap Dictionary, it comes from Jones Alley in Manhattan where junkies, with their ever-present longing, used to live’]

1. [1960s+] (US drugs, also Mr. Jones) drug addiction, esp. to heroin.

2. [1960s+] (US drugs, also A-jones) a heroin addict.

3. [1960s+] (US drugs) heroin.

4. [1960s+] the symptoms of heroin withdrawal.

5. [1970s+] (US) a strong craving or habit, whether for cigarettes, food, a person or anything, e.g. a love jones, a chocolate jones.

6. [1980s] (US drugs) a marijuana cigarette.

In compounds

jones man (n.)

[1970s+] (US black/drugs) a heroin dealer.