When you see or hear something g funny (not too funny) and it causes you to push air out of your nose at an abnormally fast rate in place of a laugh... a snicker with your sniffer, if you will.
That dank meme on ifunny made me sniffcker, but it wasn't funny enough to make me actually laugh.
Ruler of Lake Titicaca. Rumored to have a bunghole that gets very angry if it does not receive toilet paper. Cornholio the Great is often seen walking around with his shirt over his head and his hands in the air, chanting songs about his power, and his bunghole.
"I am Cornholio! You do not want to face the wrath of my bunghole, for I need TP!"
Butthead: Shut up, Beavis! (uh huh huh huh)
Beavis: Um, okay. (heh heh heh heh).