The Collaborative International Dictionary of English v.0.48:

Primp \Primp\, v. i. & t. [Cf. Prim, a.]
   To be formal or affected in dress or manners; -- often with
   up. [Prov. Eng. & Scot.] --Halliwell.
   [1913 Webster]

WordNet (r) 3.0 (2006):

primp
    v 1: dress or groom with elaborate care; "She likes to dress
         when going to the opera" [syn: preen, primp, plume,
         dress]