[1] : The Collaborative International Dictionary of English v.0.48

yardie \yar"die\, n.
   1. a member of an international gang of jamaican criminals
      who sell drugs and violence. "a much publicized raid on a
      yardie stronghold had first been simulated at riot city."
      wordnet 1.5

[2] : WordNet (r) 2.0

yardie
     n : member of an international gang of jamaican criminals who
         sell drugs and violence; "a much publicized raid on a
         yardie stronghold had first been simulated at riot city"

Yardie >> Y Words
Yardie, definition of term: Yardie
yardie_pag1.html