free-base

from WordNet (r) 3.0 (2006)

free-base
    v 1: use (purified cocaine) by burning it and inhaling the fumes
         [syn: {free-base}, {base}]

from The Collaborative International Dictionary of English v.0.48

free-base \free-base\, Free base \Free" base`\(fr[=e]" b[=a]s`),
   v. i.
   To ingest the basic form of a narcotic drug, usually by
   injection.
   [PJC]