A fluffernutter is an overly zealous or eager person.
On a pornographic set, the fluffer is charged with the responsibility of keeping an actor's penis erect without causing him to ejaculate. The fluffernutter fails at their sole job requirement when their enthusiasm triggers a "nut".
1. Your pillows are really hot if like to fluffernutter in them
2. "dude when I pulled down my pants this morning, I realised I had fluffernutter in them"