B-sian
A B-sian is not an A-sain. They are the ones who failed to get the top grade and now are stuck in the middle with a B.
I'm not an A-sain. I'm a B-sian. I'm stuck in the middle.
My friend is not an A-sain. He's a B-sian. He's stuck with a B.
She said, 'I'm not an A-sain. I'm a B-sian. I got a B.'