To be blatantly ignored and made to feel worthless.
"Dude, I called her five minutes ago, but I got pied off!"
'pissed off' in a slightly more PG manner - missing those 's's makes alot of difference. can also be 'i'm pied' 'i need a pie' etc.
'are you annoyed at the way she treated you?'
'yeah man i'm pied off!'