To expel air forcibly from the mouth and nose in an explosive, spasmodic involuntary action resulting chiefly from irritation of the nasal mucous membrane.
"I was walking through a field, enjoying the warm summer breeze gently slithering around my shirtless body. Finally I had reached the peak of my journey and suddenly out of nowhere, I had this tremendous urge to nosejaculate, I did. And it was everywhere. :)
by Twinkles McFarlane May 19, 2008