The New Oxford American Dictionary has “Origin 1960's: said to come from Jones Alley, in Manhattan, associated with drug addicts.” Some online sources dispute the claim and attribute it to Great Jones Street.

About the use of the word...

"I'm jonesing for a fix!"

I've heard people say:

"I'm jonesing for a soda!" (mostly Coke or Pepsi)

"I'm jonesing for something chocolate!"

Meaning, "I'm craving..." or "I want really badly!"

More Info: www.google.com