The Collaborative International Dictionary of English v.0.48:

Noddle \Nod"dle\, n. [OE. nodil, nodle; perh. fr. nod, because
   the head is the nodding part of the body, or perh. akin to E.
   knot; cf. Prov. E. nod the nape of the neck.]
   1. The head; also, noodle; -- used jocosely or
      contemptuously.

   Syn: noggin.
        [1913 Webster +PJC]

              Come, master, I have a project in my noddle.
                                                  --L'Estrange.
        [1913 Webster]

   2. The back part of the head or neck. [Obs.]
      [1913 Webster]

            For occasion . . . turneth a bald noddle, after she
            hath presented her locks in front, and no hold
            taken.                                --Bacon.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Noodle \Noo"dle\, n. [Cf. Noddle, Noddy.]
   1. A simpleton; a blockhead; a stupid person; a ninny. [Low]
      [1913 Webster]

            The chuckling grin of noodles.        --Sydney
                                                  Smith.
      [1913 Webster]

   2. The head; also, noddle; -- used jocosely or
      contemptuously; as, use your noodle.

   Syn: noggin.
        [PJC]

The Collaborative International Dictionary of English v.0.48:

Noodle \Noo"dle\, n. [G. nudel vermicelli.]
   A thin strip of dough, made with eggs, rolled up, cut into
   small pieces, and used in soup.
   [1913 Webster]

WordNet (r) 3.0 (2006):

noodle
    n 1: a ribbonlike strip of pasta
    2: informal terms for a human head [syn: attic, bean,
       bonce, noodle, noggin, dome]

Moby Thesaurus II by Grady Ward, 1.0:

48 Moby Thesaurus words for "noodle":
   Italian paste, bean, belfry, brain, brow, chowderhead, chucklehead,
   chump, conk, crown, dome, dope, dumbhead, dumpling, dunderhead,
   encephalon, fedellini, fettuccine, gray matter, head, headpiece,
   knaydlach, lasagne, macaroni, matzo balls, noddle, noddy, noggin,
   noodles, organ of thought, pasta, paste, pate, poll, ravioli,
   ridge, sconce, seat of thought, sensation, sensorium, sensory,
   spaetzle, spaghetti, spaghettini, stupe, vermicelli, won ton,
   ziti