Usually described as an activity that we participate in for 1/3rd of our lives, it's the best feeling ever. We hated doing it when we were kids, but can't get enough of it as adults... However on Facebook it can be defined as posting random shit that is irrelevant in the act or desire of either sleep or the love for it.
Proper example: I had such a long day, I can't wait to crawl into my new comforter and hibernate like a bear during Winter, man I love sleep!
Example: Let's punch each other in the face!
Facebook example: HEY GUIZE!!! Age Sex Location??? Random picture of an armless person - HIT LIKE!!!