With the assembly elections round the corner in Tamil Nadu and political parties, small and big, nervously planning to do their best, it seems some of them are unable to hold on to their nerves.

On popular news show Ayutha Ezhuthu on Thanthi TV, leader of the fringe Tamil-nationalist party Naam Tamilar Katchi, Seeman, lost his cool when senior leader of the CPI(M) Prof Arunan took on him for changing his stance on Periyar.

The argument started heating up when the two politicians started sparring over who will get more votes, the PWA of which Left parties are a part of, or Seeman's party.

When things came to a flash point, Seeman blew his top and told Arunan, "Don't talk like a loosu!" In Tamil parlance, 'loosu' is a derisive term used for a mentally unstable person.

An angry Arunan shot back, "You are loosu, who are you calling loosu?"

Watch the video here.