Quote (Rina @ Sat, Dec 8 2007, 11:04am)
Partly correct.
Datteeebayo has no meaning but it's not quite the same concept as saying "da" in place of "desu," that involves levels of politeness.
Think of datteeebayo as Naruto's version of "WTF?!"
good point.
"datteebayo" is a kind of ending on linguistics and itself means nothing.
but
you (reader of manga / watcher of anime) can recognize who did speak it only by reading/hearing and finding phrases including "datteebayo" at the end.
in manga or anime world those variations of ending are very easy way to characterize unique individuals and used very often for such purposes.