dattebayo the word that naruto
often ends his sentances with. verbaly, it is said as "-ttebayo"
dattebayo has no real meaning, and the closest english
equivelent is a pirates "arrgh!"
in the english
dub (which is constantly
plauged by crazed
otaku, despite it being an excelent dub and true
to the original)it is translated as "belive it!" in order for the mouth flaps to fit.
"dattebayo" is not well known to even much of the Japanese native population.
The "dattebayo" specific
ending can be considered a colloquial verb ending that makes the speaker sound uncultured, brusque, and trying to seem
tougher than they really are.