When a liquid you're drinking is spontaneously laughed up and out your nose.
That comic was so funny I upnosed my Pepsi.
by perkiset June 29, 2010
Get the upnosed mug.

To look down on someone or assume a position of superiority.
"Dude... I hate those upnosin' snobs down at Starbucks."

"Don't upnose me, motherfucker!"
by vuudoodude April 25, 2014
Get the upnose mug.