Top Definition
Acronyme for ''Original One Direction Fan''. Used by Directioners - mostly from the UK - who think they knew One Direction before everyone else & think that the other fans are fake ass bitches. Old One Direction Fans and New fans are the same. As long as they love and support the boys, they are true Directioners.
Girl 1: OMG I KNEW ONE DIRECTION BEFORE THEY EVEN BECAME FAMOUS! I GUESS I'M A O1DF!!!1!!11 IM SO AWESOOOOOME
by AnAnnoyedDirectioner January 19, 2012
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