OpIndia's analysis showed that it is evident that there is a small gap when Rajat Sharma was speaking in a low voice. Furthermore, which might look like abusive word to some people, in reality he was saying "Kya baat karein, chhodo", which means "what to say, leave it".
MEA refused to comment on media reports that alleged that Australia expelled two Indian spies who were trying to 'steal secrets' and termed them as "speculative reports."