Also called a snot rocket, the act of covering one nostril and blowing forcefully on the other to expel
flotsam and jetsam from one's sinus cavity, usally in a public place. Named for a character in
John Steinbeck's "The Red Pony" with a predilection for said disgusting
affectation.
I didn't have any
kleenex and didn't see anyone down the street, so I launched a red
pony on the sidewalk before
hopping on the bus.