a period when, while logged onto Facebook, most friends you typically Facebook Chat, as well as those whom you usually wish might Facebook Chat you ; ) , are all online at the same time.
Girl 1: "Jane, whatsup? omg so I love how Abby, Katie, Jessica, and Alyssa are all online right now."
Girl 2: "Ik, right?! Oh, heyy, but so are Brad, Erik, and Sean : )"
Girl 1: "This is a total Facebook Partyyy"