Question

Bad boy means good boy what is $ means

Answer 1

Since bad boy is the opposite of good boy, dollar may mean ₹ in context to the given example

Answer 2

$ Dollar is a currency name

which are use in aremica, Canada , Taiwan etc

Like Korea currency name is ₩ *won* is use in whole south Korea ..like dollar is use in aremica Canada Taiwan etc..

Hope it helps u

2 more understand

u go through the *general knowledge* it's help u more then me..