Cum Stained Notebook (CSN), viz., a personal listing of other poster's private information. Phrase originally coined by vanillaslave.
Elsewhere in this thingy, TC is credited with coining CSN. I believe nilla has simply has the largest one.
Nilla most certainly never coined the phrase Cum Stained Notebook. TC coined the phrase in reference to creepy, stalking catfucker bob5367875. He was known to look into the windows of young girls after cataloging every crumb of information they shared in order to track them down IRL.