The Collaborative International Dictionary of English v.0.48:

namedrop \namedrop\ v. i.
   To refer to people that one assumes one's interlocutors
   admire so as to impress them; same as to drop names.

   Syn: drop names.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

namedrop
    v 1: refer to people that one assumes one's interlocutors admire
         in order to try to impress them