Many scholars, politicians, and the lay people alike believe that Urdu in North India symbolizes a Muslim identity and culture. Based on an eight-month long ethnographic study and quantitative language data collected in Old Delhi, this article challenges this notion and shows that the symbolic meanings of Urdu have been mutating in post-colonial India. A cross-generational study involving both Muslims and Hindus shows that different generations assign different meanings to Urdu. Unlike the older generation, Muslim youth do not identify themselves with Urdu. A study of the Urdu sounds /f/, /z/, /kh/, /gh/, and /q/ in the speech of Muslim youth further demonstrates that they are losing three of these sounds. Another transformation involves the adoption of the Devanagari script to write Urdu by many Muslims. This change in the literacy practices of Muslims reinforces the shift in the symbolic meanings of Urdu. I argue that the transformation in the symbolic meanings of Urdu is reflective and constitutive of the sociopolitical changes that Muslims have undergone in the twentieth century.