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Phrase · Updated October 2026

Dattebayo (だってばよ): what Naruto's catchphrase means

だってばよ

だってばよ · dattebayo

Naruto Uzumaki adds dattebayo to the ends of his sentences. It gives them an insistent, childish emphasis, roughly "I’m telling you!", without a clear meaning of its own.

Word by word

だだcasual "is"
ってばってばinsistent "I said!", "come on!"
よよsentence-ending emphasis

What the ending adds

People do use ってば in Japanese when they’re impatient or feel ignored. For example, もういいってば! means "I said that’s enough!" Naruto adds it to nearly everything, so it becomes a character habit rather than carrying a meaning of its own.

The dub’s "Believe it!" suits Naruto’s personality and mouth movements better than it reflects the literal words.

Using it yourself

Say it in conversation and you’ll sound like you’re doing a Naruto impression; the phrase is that closely tied to him.

More examples

Hear it in real scenes

In Animei you watch anime with Japanese subtitles, tap any word for its reading and meaning, and keep it as a flashcard with the clip it came from.

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Series where it comes up early

More anime phrases