slumber party

1. N-COUNT A slumber party is an occasion when a group of young friends spend the night together at the home of one of the group. (一群年轻人在其中一位家里过夜的) 睡衣晚会[美国英语]

I'm having a slumber party for my birthday. 我正在为我的生日举办睡衣晚会。