Originally Posted by IPitydaF00l
It may be a new thing because I've seen it on other boards as well. It could also be a FilAm thing cuz most of the pinoys I know here use PI all the time.
And that is wrong. Just because others are using it doesn't mean it is correct. Unless you are happy to be in their company. It is actually an old/outdated acronym used when the Philippines was still a colony of USA.