  I'm having a little trouble with this, as I can't view Japanese properly on my machine at work. I'll have a shufti when I get home. However, I think the first one should be 'nan(i) da yo'. Nan, or sometimes nani, is 'what', 'da' is, informally, the existance of a thing, which isn't a verb in Japanese, and 'yo' adds emphasis at the end of a sentence. So it would be something like 'what (the hell) is that? ', I think. 
