according to wikipedia
a mishmash (or Mish Mash) is "a collection containing a variety of miscellaneous things."
I think one of the first guys who used the German term was Charles Lutwidge Dogson. He used it for a publication he issued (for family and friends; this was before he started to write Alice in Wonderland).
Not that I can possibly follow in such big footsteps, but aspirations got to be high ;)
I'd like to end with a quote by Friedrich Nietzsche:
Mit Recht hat man gesagt: >wo euer Schatz ist, da ist auch euer Herz<; unser Schatz ist, wo die Bienenkoerbe unserer Erkenntnis stehn. Wir sind immer dazu unterwegs, als geborne Fluegeltiere und Honigsammler des Geistes, wir kuemmern uns von Herzen eigentlich nur um eins - etwas >heimzubringen<.
Dear reader, I hope you enjoy this!
Charles Lutwidge Dodgson (27 January 1832 – 14 January 1898), better known by the pseudonym Lewis Carroll, was an English author, mathematician, logician, Anglican deacon and photographer. His most famous writings are Alice's Adventures in Wonderland and its sequel Through the Looking-Glass, as well as the poems "The Hunting of the Snark" and "Jabberwocky", all examples of the genre of literary nonsense.