hello present-self, this is your present-self speaking

Sometimes late at night I have great ideas. I don't want to forget them so I write them in a text and send it to myself. A few days ago I woke up and checked my phone and there was a one-word text from me. "Sheeple."I can only assume it's some fusion of the words "sheep" and "people". Sheep people. There is some meaningful concept behind that that I wanted myself to remember. I just wish I knew what it was.