a dutchman's blow
Blowing your nose so hard you look like a snot-slinging war hero, with one nostril acting like a cannon.
My dad did a Dutchman’s blow during breakfast. He hit the ceiling with snot.
She did a Dutchman’s blow in the car. I had to change my shirt.
He did a Dutchman’s blow at the office. Now everyone knows he’s got a snot problem.