Bad surname is an Indian last name. Bad surname also indicates the caste of person. Bad surname definition is (Banyan tree.) A section of Joshi.. People with Bad surname can also be found in other south asian countries like Pakistan, Bangladesh, Nepal and Sri Lanka. Bad surname definition is from a survey conducted during British rule in India. Many surnames in India indicate the type of work done by the person or by someone in family from whom the family inherited the surname. Surnames help spread casteism in India. One of the intellectuals suggested to drop surnames in India so that people can overcome caste differences easily.