also: パジャマパーティ
noun
pajama party; slumber party
A casual overnight gathering where participants wear pajamas; a direct loan from English, common in youth culture.
今週末、友達の家でパジャマパーティーをする予定だ。
We're planning to have a pajama party at a friend's house this weekend.
パジャマパーティーにはお菓子と映画が欠かせない。
Snacks and movies are essential for a pajama party.
A more general Japanese term for a sleepover, not necessarily involving pajamas as a theme.
Loanword from English 'pajama party' (or 'pyjama party').