be having a moment idiom
informal在某个时刻非常受欢迎（或时髦）
to be very popular or fashionable at a particular time
Right now, oversized sweaters are having a moment. 现在，大一号的套头衫很时髦。
UK informal（因在考虑其他事情或因情绪激动而导致）片刻的失神，走神
to not be acting normally for a short time, for example because you are not thinking about what you are doing, or because you are feeling a strong emotion
He was staring out of the window and he didn't answer me - I think he was just having a moment. 他盯着窗外，没有回答我——我想他一时走神了。