Chaas is a curd-based drink popular across the Indian subcontinent. In Magahi and Bundeli, it is called Mattha. In Rajasthani it is called Khati chaas or khato, in Odia it is called Ghol/Chaash, moru in Tamil and Malayalam, taak in Marathi, majjiga in Telugu, majjige in Kannada, ale in Tulu and ghol in Bengali. From Wikipedia
