DuckCorp Dico

Found one definition

1.                 From The Jargon File (version 4.4.7, 29 Dec 2003):
                   
   
   
                   
                     
   poser
    n.
       [from French poseur] A wannabee; not hacker slang, but used among
       crackers, phreaks and warez d00dz. Not as negative as lamer or leech.
       Probably derives from a similar usage among punk-rockers and metalheads,
       putting down those who “talk the talk but don't walk the walk”.