Obs. slang. [cf. BULKER.] (See quots.)
1673. R. Head, Canting Acad., 35. Bulk and File. The one jostles you whilst the other picks your pocket.
1721. in Bailey.
1725. New Cant. Dict, Bulk, an Assistant to a File or Pickpocket, who jostles a Person up against the Wall, while the other picks his Pocket.