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.
by Jocko Love November 9, 2013
by Squinks February 2, 2010