South India has 4 different major states, but people in north, east and west end up calling all of them Madrassi. Here’s a general explanation of who lives in South India, and what is peculiar about each of the major states, Kerala, Tamil Nadu, Andhra Pradesh and Karnataka.
“South India is the area encompassing India’s states of Andhra Pradesh, Karnataka, Kerala, Tamil Nadu and Telangana as well as the union territories of Lakshadweep and Puducherry, occupying 19.31% of India’s area. The region is also known as Dravida as is used in the national anthem. South India is frequently referred to as the Hindu heartland of India by prominent travel guides.”