In the original Japanese release of Naruto, "(Da)ttebayo!" (「(だ)ってばよ!」) is Naruto Uzumaki's catch phrase. He uses it at the end of most of his sentences as a way of making his speech unique. Naruto inherited this from his mother, Kushina Uzumaki, who would instead end her sentences with "(Da)ttebane" (「(だ)ってばね」) when she got excited or angry, something she had hoped — albeit unsuccessfully – that her son would not inherit.
Dattebayo can be translated as to "y'know". And "Believe It!" was used in the English dub to match his lip movements. Around the start of the Chūnin Exam Arc, however, "Believe it" fell out of use. It is translated also as "Do you get what I'm saying?", which he uses before the fight with Zabuza Momochi, where it was hard to match the lip movements when translated into English.
- ↑ Naruto chapter 498, pages 2-5