A sign for calling up to frienship towards others.
This became very popular by the youth after the release of the Tamil film 'BABA', a story of a lorry driver living in lower middle class Chennai where Rajini performs the leading role and on affiches he is holding his right hand up, his fingers imitating a classical Indian classical dance mudra (non-verbal mode of expression) of the deer.
This shot was taken in the same road where they played cricket.