The Collaborative International Dictionary of English v.0.48:

Macaronian \Mac`a*ro"ni*an\, Macaronic \Mac`a*ron"ic\, a. [Cf.
   It. maccheronico, F. macaronique.]
   1. Pertaining to, or like, macaroni (originally a dish of
      mixed food); hence, mixed; confused; jumbled.
      [1913 Webster]

   2. Of or pertaining to the burlesque composition called
      macaronic; as, macaronic poetry.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Macaronic \Mac`a*ron"ic\, n.
   1. A heap of things confusedly mixed together; a jumble.
      [1913 Webster]

   2. A kind of burlesque composition, in which the vernacular
      words of one or more modern languages are intermixed with
      genuine Latin words, and with hybrid formed by adding
      Latin terminations to other roots.
      [1913 Webster]

WordNet (r) 3.0 (2006):

macaronic
    adj 1: of or containing a mixture of Latin words and vernacular
           words jumbled together; "macaronic verse"