Yeah...it sounds like he says, "Yeah Mayore!" But, the
Mayore" is the word i cant figure out. I mean,, unless he is saying Yeah Mayore! WTF?
You are correct, he does say the Yeah Mayore thing but that's just what it sounds like. What he says is actually in Russian.
From a Yelchin interview :
Yelchin: There are certain things in the movie that are very Russian that is difficult for an American audience to pick up on.
Like when [Kirk and Sulu] freefall and I capture them and I say something in Russian….[says Russian phrase]…it means "Oh man!" basically, which is something I ad-libbed. Which goes back to what I was saying.
Chekov never speaks Russian in the series,
and that was Russian slang. And that that is something I decided to add just for the hell of it, because JJ [Abrams] said ‘throw in some Russian, let’s do it for fun.’
It was just a moment that needed some kind of reaction, and they loved it out there. It is one of those things that Russian people
get.