snot rocket
n.— «Other wintertime athletes, however, are devoted to another form of nose maintenance known variously as the farmer blow, the snot rocket or snagging. Here’s how: Press your finger on one side of the nose, blocking off a nostril, and blow forcefully out the other nostril. Repeat on the opposite side. Done correctly, you expel viscous booger wads harmlessly into the air and out onto the trail.» —“On the Run” by Richard Chin St. Paul Pioneer Press (Minnesota) Jan. 5, 2003. (source: Double-Tongued Dictionary)