let her back hair down

• vi. 不拘礼节(态度随便)

let her back hair down的用法和样例：

例句

用作不及物动词 (vi.)

1. Her clothes usually gave an offhand effect.
   她的衣服通常给人以一种不拘礼节的感觉。
2. It's wonderful to let your hair down at the weekend after you've been working hard all week.
   辛苦工作一周後在周末不拘礼节轻松一下真是太好了。