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1. long hair don't care
Lil Wayne often uses this in his lyrics. He is saying he doesn't care if a girl, chick, woman, whoever has a "bush" or long pubic hairs. He will still fuck you.
Mr.Carter-Lil Wayne

I know my role, and I play it well
And I wear it well, on my Libra scale
I suck a pussy, fuck a pussy leave it there
long hair don't care

You can also see it like these,

long hurr don't curr
long hair don't even care
2. long hair don't care
Commonly used in tweets by girls as a way to draw attention to their precious locks that they obsessively grow.
"omg, just woke up late for class and I look a mess. Oh well, long hair don't care! #longhairprobs (insert selfie here)"
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