Answer in a word:

Who was known as ‘’Mountain – Rat?

Shivaji was known as the “Mountain-Rat.” Shivaji was constantly expanding his area of the rule which became the cause of disturb for Aurangzeb. He used to call him “Mountain-Rat.” Many times he tried to suppress him, but he succeeded each time. When Shivaji came to meet him, Aurangzeb jailed him, but he escaped. This made Shivaji one of the greatest enemies of Aurangzeb.