A pajama PARTY is a type of sleepover where guests wear their pajamas and spend the night together. It is a popular activity among children and teenagers, but adults can also enjoy it. The term 'pajama PARTY' is derived from the combination of the words 'pajama' and 'PARTY'. It is a fun way to spend time with friends and family, and often involves activities such as watching movies, playing games, and eating snacks.