Source : Webster's Revised Unabridged Dictionary (1913)

Tag-rag \Tag"-rag`\, n. & a. [See {Tag} an end, and {Rag}.]
   The lowest class of people; the rabble. Cf. {Rag, tag, and
   bobtail}, under {Bobtail}.

         If the tag-rag people did not clap him and hiss him, I
         am no true man.                          --Shak.