Misspelling of the word "pron". Appears when one writes too fast on a keyboard. Used also on forums to make staff believe you talk aboutsomething that isn't a pron, when in fact it is.
1. A misspelling of the word "porn" (short for pornography). Often seen in search engine histories.
2. A popular euphamism for porn, often seen used by wannabe hackers and script kiddies who have to use "1337speak" in order to seem cool. Became popular after the search-engine typo became more common.