The process of expelling a brief burst of air out of one's nostrils to signify mild amusement. Usually performed when reading online forums or comments.
"I wouldsay I LOL'd, but in reality it was a nosepuff. Here, have an upvote anyway."
When something online is fun enough to warrant a response but you're alone in your room and laughing is excessive so you exhale lightly out of your nose.
Pajama casual is a term used when working from home and preparing for a video conference. All business above the waist and your pajama pants down below.