A deviant sexual act involving the use of sinus mucus. Specifically, an individual will blow snot (mucas) from their nose on to the penis, vagina and/or anus and then masturbate, fellate or penetrate the subject using the nasal mucas as lubrication to bring the subject to climax.
Upon getting approval from his spouse to engage in Snot Knobbing...the sexual partner emptied her nasal passages (mucas) on to his genitals and proceeded to fellate him to ejaculation.
A person who, caught unaware and unprepared, has sneezed, coughed, or otherwise covered themselves in mucus, and is walking towards someone or something that can help them.
As they usually have outstretched arms, grasping for a facial tissue, they resemble a Zombie.
"Joe must have a cold. He ran out of the meeting as a snot zombie."
"Amy! Cover your face when you sneeze! You just turned your brother into a snot zombie!"
When one wipes his/her anal crack with another individual's nose, thus riding someone's snot like a horse jockey.
This may either be a form of revenge or punishment, or a means of enhancing masturbation.
After Bob fell asleep, Charlie pulled down his pants and snot jockey'd the hell out of Bob's face.
To blow one's nose by blocking one nostril with a finger and blowing snot from the other nostril onto the floor or ground. See Farmer Snort.
Chuck used to bike to workeven in the winter and would always get a runny nose, which he would take care of with a couple of quick snot rockets in full view of the rush hour traffic.