Source : Webster's Revised Unabridged Dictionary (1913)

Necked \Necked\, a.
   1. Having (such) a neck; -- chiefly used in composition; as,
      stiff-necked.

   2. (Naut.) Cracked; -- said of a treenail.

Neck \Neck\, v. t. [imp. & p. p. {Necked}; p. pr. & vb. n.
   {Necking}.] (Mech.)
   To reduce the diameter of (an object) near its end, by making
   a groove around it; -- used with down; as, to neck down a
   shaft.

Source : WordNet®

necked
     adj : having a neck or having a neck especially as specified
           (often used in combination) [ant: {neckless}]