This is a Hindi movie dialogue and the only words they know about Tamil. The funny thing is that these people consider that people from South speak the same language .  My request for all is to learn about India first and not to call the entire south people Madrasi  as every state in South has their own language and culture and it is entirely different from one another.

I know Tamil but not from Tamil Nadu, i was in Chennai during 2003 to 2007 and learned the language .