The Collaborative International Dictionary of English v.0.48:

Neck \Neck\ (n[e^]k), n. [OE. necke, AS. hnecca; akin to D. nek
   the nape of the neck, G. nacken, OHG. nacch, hnacch, Icel.
   hnakki, Sw. nacke, Dan. nakke.]
   1. The part of an animal which connects the head and the
      trunk, and which, in man and many other animals, is more
      slender than the trunk.
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   2. Any part of an inanimate object corresponding to or
      resembling the neck of an animal; as:
      (a) The long slender part of a vessel, as a retort, or of
          a fruit, as a gourd.
      (b) A long narrow tract of land projecting from the main
          body, or a narrow tract connecting two larger tracts.
      (c) (Mus.) That part of a violin, guitar, or similar
          instrument, which extends from the head to the body,
          and on which is the finger board or fret board.
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   3. (Mech.) A reduction in size near the end of an object,
      formed by a groove around it; as, a neck forming the
      journal of a shaft.
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   4. (Bot.) the point where the base of the stem of a plant
      arises from the root.
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   Neck and crop, completely; wholly; altogether; roughly and
      at once. [Colloq.]

   Neck and neck (Racing), so nearly equal that one cannot be
      said to be before the other; very close; even; side by
      side.

   Neck of a capital. (Arch.) See Gorgerin.

   Neck of a cascabel (Gun.), the part joining the knob to the
      base of the breech.

   Neck of a gun, the small part of the piece between the
      chase and the swell of the muzzle.

   Neck of a tooth (Anat.), the constriction between the root
      and the crown.

   Neck or nothing (Fig.), at all risks.

   Neck verse.
      (a) The verse formerly read to entitle a party to the
          benefit of clergy, said to be the first verse of the
          fifty-first Psalm, "Miserere mei," etc. --Sir W.
          Scott.
      (b) Hence, a verse or saying, the utterance of which
          decides one's fate; a shibboleth.

                These words, "bread and cheese," were their neck
                verse or shibboleth to distinguish them; all
                pronouncing "broad and cause," being presently
                put to death.                     --Fuller.

   Neck yoke.
      (a) A bar by which the end of the tongue of a wagon or
          carriage is suspended from the collars of the
          harnesses.
      (b) A device with projecting arms for carrying things (as
          buckets of water or sap) suspended from one's
          shoulders.

   On the neck of, immediately after; following closely; on
      the heel of. "Committing one sin on the neck of another."
      --W. Perkins.

   Stiff neck, obstinacy in evil or wrong; inflexible
      obstinacy; contumacy. "I know thy rebellion, and thy stiff
      neck." --Deut. xxxi. 27.

   To break the neck of, to destroy the main force of; to
      break the back of. "What they presume to borrow from her
      sage and virtuous rules . . . breaks the neck of their own
      cause." --Milton.

   To harden the neck, to grow obstinate; to be more and more
      perverse and rebellious. --Neh. ix. 17.

   To tread on the neck of, to oppress; to tyrannize over.
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The Collaborative International Dictionary of English v.0.48:

Crop \Crop\ (kr[o^]p), n. [OE. crop, croppe, craw, top of a
   plant, harvest, AS. crop, cropp, craw, top, bunch, ear of
   corn; akin to D. krop craw, G. kropf, Icel. kroppr hump or
   bunch on the body, body; but cf. also W. cropa, croppa, crop
   or craw of a bird, Ir. & Gael. sgroban. Cf. Croup,
   Crupper, Croup.]
   1. The pouchlike enlargement of the gullet of birds, serving
      as a receptacle for food; the craw.
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   2. The top, end, or highest part of anything, especially of a
      plant or tree. [Obs.] "Crop and root." --Chaucer.
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   3. That which is cropped, cut, or gathered from a single
      felld, or of a single kind of grain or fruit, or in a
      single season; especially, the product of what is planted
      in the earth; fruit; harvest.
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            Lab'ring the soil, and reaping plenteous crop,
            Corn, wine, and oil.                  --Milton.
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   4. Grain or other product of the field while standing.
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   5. Anything cut off or gathered.
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            Guiltless of steel, and from the razor free,
            It falls a plenteous crop reserved for thee.
                                                  --Dryden.
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   6. Hair cut close or short, or the act or style of so
      cutting; as, a convict's crop.
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   7. (Arch.) A projecting ornament in carved stone.
      Specifically, a finial. [Obs.]
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   8. (Mining.)
      (a) Tin ore prepared for smelting.
      (b) Outcrop of a vein or seam at the surface. --Knight.
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   9. A riding whip with a loop instead of a lash.
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   Neck and crop, altogether; roughly and at once. [Colloq.]
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