Repeated use of the mocking ‘Didi-O-Didi!’ by the PM has sparked a row on decorum A lot is at stake for Prime Minister Narendra Modi in the West Bengal elections as is evident from the manner he has been repeatedly and personally attacking Trinamool Congress president and Chief Minister Mamata Banerjee. The mocking tone which Mr Modi uses to address the Chief Minister, repeatedly saying “Didi-o-Didi!” has evoked a strong response not only from the Trinamool Congress but from the Chief Minster also. “He is mocking me ( amake bhengache). There should be a standard. I will not speak to him in this language,” Ms. Banerjee said on Monday at Basirhat.