Source : Webster's Revised Unabridged Dictionary (1913)

Scalp \Scalp\, v. t. [imp. & p. p. {Scalped}; p. pr. & vb. n.
   {Scalping}.]
   1. To deprive of the scalp; to cut or tear the scalp from the
      head of.

   2. (Surg.) To remove the skin of.

            We must scalp the whole lid [of the eye]. --J. S.
                                                  Wells.

   3. (Milling) To brush the hairs or fuzz from, as wheat
      grains, in the process of high milling. --Knight.

Scalp \Scalp\, v. i.
   To make a small, quick profit by slight fluctuations of the
   market; -- said of brokers who operate in this way on their
   own account. [Cant]

Scalp \Scalp\ (sk[a^]lp), n. [Cf. {Scallop}.]
   A bed of oysters or mussels. [Scot.]

Scalp \Scalp\, n. [Perhaps akin to D. schelp shell. Cf.
   {Scallop}.]
   1. That part of the integument of the head which is usually
      covered with hair.

            By the bare scalp of Robin Hodd's fat friar, This
            fellow were a king for our wild faction! --Shak.

   2. A part of the skin of the head, with the hair attached,
      cut or torn off from an enemy by the Indian warriors of
      North America, as a token of victory.

   3. Fig.: The top; the summit. --Macaulay.

   {Scalp lock}, a long tuft of hair left on the crown of the
      head by the warriors of some tribes of American Indians.

Source : WordNet®

scalp
     n : the skin that covers the top of the head; "they wanted to
         take his scalp as a trophy"
     v 1: sell illegally, as on the black market
     2: remove the scalp of; "The enemies were scalped"