The Collaborative International Dictionary of English v.0.48:

Mingle-mangle \Min"gle-man`gle\, v. t. [Reduplicated fr.
   mingle.]
   To mix in a disorderly way; to make a mess of. [Obs.]
   --Udall.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mingle-mangle \Min"gle-man`gle\, n.
   A hotchpotch. [Obs.] --Latimer.
   [1913 Webster]

WordNet (r) 3.0 (2006):

mingle-mangle
    n 1: a motley assortment of things [syn: odds and ends,
         oddments, melange, farrago, ragbag, mishmash,
         mingle-mangle, hodgepodge, hotchpotch, gallimaufry,
         omnium-gatherum]