1 definition by Sam Fenderson
the penis is removed from vigourous vagina penetration and inserted into the oral cavity and ejaculation ensues, followed by a swift blow to the throat, causing the recipiant to spit up the oral contents.
mary: if you behave yourself at the christmas party i will let you perform a spitnum!
henry: this is shaping up to be the best christmas ever!
henry: this is shaping up to be the best christmas ever!
by Sam Fenderson September 16, 2008