That's an awesomely superb Tamil dance song that was popular not only in Tamil speaking regions but entire India. It could be, and sometimes still can be heard in North Indian dance parties, where people don't know the meaning of the song, but dance to the tune anyway. The utterly simple words of the 'mukhda' help it of course.
Finally the song is now remade in Hindi as Hum na chhodein todein phodein jo bhi hum se panga le. Not as simple, but still, the song is there in Hindi too now. For the lyrics and translation, you can check THIS POST.