I don't know any Chinese, but I went to a kind of sales pitch by a Chinese salesman. He kept saying a word at the end of some sentences. The best I could think of the English pronunciation would be div-e-day. It was always in the form of a question, so I think it might be something to the effect of "am I right" in English. Any guesses?
The "word" you are asking about is not one word but two: "对不对" 对： Right 不对： Wrong So he is asking you that: Is it correct or not? But actually meaning for this is trying to convince people like "Don't you think what i said is very reasonable? Yes, I am right!"
The Pinyin for these words: DUI 对, BU 不， DUI 对