Is it cool if you let your hair down at school?

The expression ''let your hair down'' means be free and bold.

Rapunzel. Oh, and it's 'let down your hair' not let's down your hair

Just keep it up before u disappear then put it down on the bus or at school

news about the murder got out

I usually just put gel on my hands, run it through, and then put some more on the front so it stays up. It's the normal kind of style.