This term, originating from Japanese, refers to fans' shouting out slogans and waving glow sticks to support their idols during a live concert or other events.
这个词，源自日本，主要指的是一些粉丝们呼喊着口号，挥动着荧光棒，在演唱会或者现场表演的时候，支持他们的爱豆（偶像）。

call it a day: to decide to stop working, especially because you have done enough or you are tired
Look, we're all tired -- let's call it a day.
看，我们都累了，今天就到这儿吧。

call the shots: to be in a position of authority so that you can give orders and make decisions
We young girls can call the shots nowadays.
我们年轻女孩如今也可以掌握大局了。