A common occurence on facebook pages, where the thread is inexplicably turned sour by a DFB (drunk facebooker) or generally bitter person, usually resulting in the sudden end of an otherwise happy thread.
Oh man, it was about trees and butterflies, everyone was feelin' the love of the thread and happy postings 'til Suzie got drunk and pulled a Page Stain.
by bigolepuddytat July 7, 2010
Get the Page Stain mug.