Why do they call it a Sleepover?

My youngest hosted her first "big girl" sleepover with her friends. There were only 4 girls total, but here is a rundown of how the evening went. In less than 5 minutes the bedroom looked like a tornado took a hurricaine on a date on a Tilt-A-Whirl and vomited up the contents of not only a clothing store but a Toys-R-Us too. Then we laughed while pizza got cold on our plates. Then we watched a movie while we kept laughing and rearranging the disaster zone. Then we had brownies, brushed out teeth, had more brownies, more teeth brushing, and watched another movie. We finally fell asleep about 10:30 or so. Then the oldest daughter (who was at her own sleepover at a friend's house) called about mid-night, she wanted to go home. So hubby went to go get her, then turned around to go get the pillow they forgot, then came home and got here about 1:00 in the morning. At about 3:00 somebody had a little scary dream so of course I had to go out and rub a back. No, I don't know which child it was because a) it was dark and b) they moved in their sleep and where they originally started out was NOT where they woke up this morning. Then the alarm (hubby's..not mine) went off at 5:30 so sleep was no longer an option. The kids started waking up at about 6:30 and we were off. And even with the lack of sleep, it was a fun night. The kids played, and played, and played and enjoyed every minute of it.