The Collaborative International Dictionary of English v.0.48:

Badger \Badg"er\, v. t. [imp. & p. p. Badgered; p. pr. & vb.
   n. Badgering.] [For sense 1, see 2d Badger; for 2, see
   1st Badger.]
   1. To tease or annoy, as a badger when baited; to worry or
      irritate persistently.
      [1913 Webster]

   2. To beat down; to cheapen; to barter; to bargain.
      [1913 Webster]