what's the meaning if someone say "your hair is really rocks"?

what's the meaning if someone say "your hair is really rocks"?
what's the meaning if someone say "your hair is really rocks"?

what's the meaning if someone say "your hair is really rocks"?
Your hair is really rocks.你的发型真炫!
全句翻译：如果某人说“你的发型真炫!

what's the reationship between you? maybe your hair is really cool in fact,or you are so cool.