1) Unskilled person 
A Rag-picker, or Chiffonnier, was a 19th- and early 20th-century term for someone who made a living by rummaging through refuse in the streets to collect material for salvage. Scraps of cloth and paper could be turned into cardboard, broken glass could be melted down and reused, and even dead cats and dogs could be skinned to make clothes. The rag...
• (n.) One who gets a living by picking up rags and refuse things in the streets.
Rag'pick`er (răg'pĭk`ẽr) noun One who gets a living by picking up rags and refuse things in the streets. 
noun an unskilled person who picks up rags from trash cans and public dumps as a means of livelihood