POPJ
= P =
post
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".
--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.