Question

Why is Carl the Busta?​

Answer 1

The First Anglo-Maratha War (1775–1782) was the first of three Anglo-Maratha Wars fought between the British East India Company and Maratha Empire in India. The war began with the Treaty of Surat and ended with the Treaty of Salbai.

Answer 2

Throughout the game, Ryder has a habit of calling CJ a "buster".

_________

He wasn't saying it was his street name. He was saying that Ryder calls him Buster - which (to add) is in large due to the fact CJ left the gang and tried to better himself.