When someone plugs one nostril & blows hard. Phlegm is then ejected, at high speed, from the other nostril.
"you're outside, you don't have a tissue: Just do a coach sneeze."
"eww, did you see that? He just did a coach sneeze!"
"eww, did you see that? He just did a coach sneeze!"
by Triptakers June 15, 2012