Balalaika - If you thought it was just a catchy word...

I thought it was only a catchy word that Rahman usually uses to zap up his peppy numbers when I heard the word Balalaika (from Sivaji). However, much to my surprise, I recently found that Balalaika is a musical instrument of Russian origin.


I wonder do Rahman's other 'catchy phrases' like' kuluvalile' from Muthu have an origin of their own? Something interesting to be researched!!!!