to let one's hair down. To let one's hair down描绘出一幅可爱的画面。过去，西方女子很多都留长头发，出去应酬时把头发盘在头上梳出各种式样来。晚上回家后，她们就把发卡一个个地从头发里拿出来，让头发很自然地披在肩上。 To let one's hair down 的实质意思也就是解除表面的装饰，
使一切显得很自然、真实和放松。 To let one's hair down 不一定用于女子，也可
以用在男性。
http://www.for68.com/new/2006\7\ch283618212276002992-0.htm

let your hair down
to relax and enjoy yourself without worrying what other people will think. It's nice to let your hair down once in a while and go a bit wild.
See also: down, hair, let
let your hair down
to relax and do what you want. The party gives you a chance to let your hair down at the end of the week.
See also: down, hair, let
或拋開煩腦

Let your hair down:
Behave in a free or uninhibited manner.

"You go ahead, let your hair down"可译作:
向前走,莫回头

"You go ahead, let your hair down"和"妹妹你大胆地往前走,莫回头"虽风格截然不同,但意思颇近.

附Put Your Records On歌词:

Three little birds, sat on my window.
And they told me I don't need to worry.
Summer came like cinnamon
So sweet,
Little girls double-dutch on the concrete.

Maybe sometimes, we got it wrong,
but it's alright
And nothing seems to change,
and it all will stay the same.
Oh, don't you hesitate.

Girl, put your records on,
tell me your favourite song
You go ahead, let your hair down
Sapphire and faded jeans,
I hope you get your dreams,
Just go ahead, let your hair down.
You're gonna find yourself somewhere, somehow.

Blue as the sky, sombre and lonely,
Sipping tea in the bar by the road side,
(just relax, just relax)
Don't you let those other boys fool you,
Gotta love that awful hairdo.

Maybe sometimes, we feel afraid, but it's alright
The more you stay the same,
the more they seem to change.
Don't you think it's strange?

Girl, put your records on,
tell me your favourite song
You go ahead, let your hair down
Sapphire and faded jeans,
I hope you get your dreams,
Just go ahead, let your hair down.

You're gonna find yourself somewhere, somehow.

Just more than I could take, pity for pity's sake
Some nights kept me awake,
I thought that I was stronger
When you gonna realise,
that you don't even have to try any longer.
Do what you want to.

Girl, put your records on,
tell me your favourite song
You go ahead, let your hair down
Sapphire and faded jeans,
I hope you get your dreams,
Just go ahead, let your hair down.

Girl, put your records on,
tell me your favourite song
You go ahead, let your hair down
Sapphire and faded jeans,
I hope you get your dreams,
Just go ahead, let your hair down.

Oh,
You're gonna find yourself somewhere, somehow.