According to Urban Dictionary, the terms Sage (http://www.urbandictionary.com/define.php?term=sage) and Age (http://www.urbandictionary.com/define.php?term=age) are Chanspeak memes that allow you to either make a thread die or live more (Sage being the die one).
Sage has even been turned into a 4chan mascot just like moot, W.T. Snacks, and Yotsuba called Sage Man: http://www.4chan.org/flash/?file=SageMan.swf&title=Sage+Man
So, here is the question: Does Sage deserve its own article? It’s just like Bump and all those other Chanspeak memes. I think it deserves one.