Quote Originally Posted by Buffalobiian
Does Dattebayo actually translate to "believe it", or is it something completely different, maybe even meaningless?

I believe it has no direct translation... It is just meant to add great emphasis on what he says.

For example, if he says "I'm gonna beat you" but adds "dattebayo" to it. It becomes something more along the lines of "I'm gonna punch through your gut, rip out your hard shit filled intestines, tie them into nun chucks and beat you to death with them" (Slight exaggeration)

And pardon my French (AKA homosexuality)