Definitions for "Pron"
Porn purposefully misspelled, to avoid internet censoring. Not an FC invention, but prevalent here nonetheless.
A long time ago in a galaxy far, far away someone posted a request for porn on a bulletin board, only, because of a typing error what he ended up asking for was "pron". Since then this has become a bit of a running joke and so it is now deliberately misspelt.
Pronunciation, "that part of a student which is the same at the end of a language course as at the beginning." (Tom McArthur)