pron

Its actually pr0n, and its spelled this way so that it doesn't show up when someone searches the word "porn". It was introduced as a masking tool to prevent people from logging your involvement in less than reputable activities. Much like the original intent behind 1337 speak itself. Similar words for divisions of pr0n that are still in use include: R@ygold - (pedophylia) qwerty - (bestiality) showme - (voyuer) rorikon/lolikon - (anime child) momashi - (incest) BBW - (Big Breasted Women) etc...