The act of accidentally posting a nonsense message to Facebook by sitting on your phone.
A typical buttbooking update:
Joe Shmoe: lll,,ll,;;..
2 hours ago via Facebook for BlackBerry
Question Answered, Topic Closed
Acronym can be found on message boards where moderators manually close threads once the question in thread has been answered. Therefore, it's usually the text of the last post in a thread (by the moderator).
Thread title: "How is .99999... = 1?"
*lots of discussion*
*proof shows up*
Moderator: QATC
*thread is closed*
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