The Collaborative International Dictionary of English v.0.48:

Jumble \Jum"ble\, v. t. [imp. & p. p. Jumbled; p. pr. & vb. n.
   Jumbling.] [Prob. fr. jump, i. e., to make to jump, or
   shake.]
   To mix in a confused mass; to put or throw together without
   order; -- often followed by together or up.
   [1913 Webster]

         Why dost thou blend and jumble such inconsistencies
         together?                                --Burton.
   [1913 Webster]

         Every clime and age
         Jumbled together.                        --Tennyson.
   [1913 Webster]

WordNet (r) 3.0 (2006):

jumbled
    adj 1: in utter disorder; "a disorderly pile of clothes" [syn:
           disorderly, higgledy-piggledy, hugger-mugger,
           jumbled, topsy-turvy]