The Collaborative International Dictionary of English v.0.48:

Mishmash \Mish"mash`\, n. [Cf. G. mish-mash, fr. mischen to
   mix.]
   A hodgepodge or hotchpotch; a confused jumble. [Also spelled
   mishmosh.] --Sir T. Herbert.
   [1913 Webster +PJC]

WordNet (r) 3.0 (2006):

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