I Want To Buy Something With My Own Money, But My Mum Says No. What Do I Do?

If it's your money, that 당신 earned, 당신 have the right to do with it as 당신 will.
So fuck her, buy what 당신 want.

Just let it go.

when i want to use my own money and mom and dad says no. i just let it go and wait til 다음 time.
또는 something like; "But what if i do/dont ..."

It depends on how badly 당신 want it.

Why doesn't your mum want 당신 to buy the hat? Is there something wrong with it? And why did 당신 have ask her in the first place?

I can understand parents not wanting their kids to buy all sorts of crap that will mess up their house... say 당신 wanted to buy a giant 담홍색, 핑크 피아노 (I dunno.. I panicked), that could be understandable because that would take up so much 우주 and be super annoying. If there is nothing offensive about the hat, explain to your mum that 당신 believe 당신 deserve to buy the hat, because 당신 worked hard to earn the money to buy it.

buy it anyways...it don't consern her, it's ur money...

Yeah, my mom does the same thing. So I ask my grandma and my mom says fine buy it, just stop asking your grandma for things. It works every time.

Just go 의해 yourself. She cant stop u if shes not there.

That happens to me all the time...
If 당신 really want it that badly and think it'll be useful, keep asking her every so often until she finally gives in. And try to give her some reasons that might persuade her. But, don't ask her every 초 until she gets so annoyed, she'll most likely not let 당신 get the hat.

Okay, so buy it. I read over your 코멘트 and 당신 need the credit card details right? If 당신 have your money in cash, tell her that you'll give her the money after 당신 use the credit card so it'll be a fair exchange for it. Like 당신 take the amount of money off the credit card and give her it back in return (like pay her it back) it's worked for me before :D