Chaas ( gu:છાશ chhash, hi:छाछ chhachh) is a curd -based drink popular across the Indian subcontinent . [1] 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 Telug...