Nosepuff

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 would say I LOL'd, but in reality it was a nosepuff. Here, have an upvote anyway."

Nosepuff by baggachipz! March 4, 2013

Nose Puff 

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.

*Watches video of sneezing panda*
*nose puffs*

Nose Puff by Biblorino November 20, 2017