The phrase simply means that you are doing extremely well and are very successful. Success, fame and fortune will inevitably come with a large amount of haters. This is not a bad thing, without haters there is no one to prove wrong. Understanding that hate is a sign of envy and jealously should be used to motivate you. Just remember, haters gonna hate, that just means you're doing well.
"Yoo dude did you see Dan Bilzerian's snap story!? Looks like he was hunting warthogs out of a chopper down in Texas with like five hot mami's, friggin epic!"
"No, I hate Dan Bilzerian. His company is gonna fail and he'll be a broke ass cat like me."
Dan Bilzerian has haters on the payroll and they are working for free.
Bitch boy: Yo Dan I was saved today.
Dan: Bruh what happened!?
Bitch boy: I was about to hit Chelsea from the back when I realized that she had used that thot dog Snapchat filter in her story!
Dan: Bruh what!
Bitch boy: Ya! That's when I found out she was a thot and before I could stick my dick in her pussy and receive every STD known to man, the thot patrol bursted through the wall and yelled "THOT B GONE!" And erased the thot from existence.
Dan: You can always count on Thot Patrol