Definitions by Sairisu

Mattari 

Mattari (Mah-Tah-Ree)is slang Japanese used when telling someone to calm down. To pronounce it properly, stretch out the second 'a'.

No.1-"HOLY FLYING ONIGIRI BALLS, Someone just ripped out my genitals!!! "
Stealing the peach
No.2-(obviously not paying attention)"Mattari, we'll just get you some new ones"

Mattari by Sairisu September 1, 2008

dattebayo 

Directly derived from an actual interview with the creator himself, Masashi kishimoto.
(Quote)
- Is Naruto's favorite phrase, "dattebayo" modeled on anything?

K: That isn't really modeled on anything either. When I thought of childlike
speech, "dattebayo" instantly came to mind. It's like it's become a part of
Naruto, and even now it brings out his "mischievousness".
(End quote)

I guess it's just up to fans to determine for themselves what it truly means...

Maybe there's no real definition to it, dattebayo!

dattebayo by Sairisu January 29, 2006