power lunch是“午餐会”，指“公司人员（通常是高层）在吃午餐时开的会”（an occasion at which people eat lunch while they are working and talking about business）。

例句：

We're discussing the possibilities of a company merger over a power lunch this afternoon.

今天下午我们在午餐会上讨论了公司合并的可能性。