Question: why bjp supporters are called chaddi?
Answer: Pink Chaddi campaign. In the midst of the tension, a protest was started by a group of young women, called the "Pink Chaddi" campaign, where they urged a peaceful protest (described as Gandhian in the press) to all of India, by sending pink underwear ("Chaddi" in Hindi) to Muthalik's office on Valentine's Day.