I said something super racist and I feel so bad
Are you serious? Why would you say something terribly racist?
I don't know. I thought it would make me sound cool.
You should immediately apologize to the person you made that comment to. It is not right for you to demean someone like that.
I didn't think it would upset anyone since the person is a loser.
It doesn't matter who the person is, it's never right to say racist things. You need to tell them that you're sorry right away.