PRIG is a 4 letter word that starts with P.

1. \Prig\, v. i. [imp. & p. p. {Prigged}; p. pr. & vb. n.
   {Prigging}.] [A modification of prick.]
   To haggle about the price of a commodity; to bargain hard.
   [Prov. Eng. & Scot.]
   
   

2. \Prig\, v. t.
   1. To cheapen. [Scot.]
   
   2. [Perhaps orig., to ride off with. See {Prick}, v. t.] To
      filch or steal; as, to prig a handkerchief. [Cant]
   
   

3. \Prig\, n.
   1. A pert, conceited, pragmatical fellow.
   
            The queer prig of a doctor.           --Macaulay.
   
   2. A thief; a filcher. [Cant] --Shak.