After having sex with a virgin you pull out and your penis slaps up against you stomach.
Leaving a blood stain.
Guy 1: dude the other night i was fucking this virgin and i pulled out and my penis came up and slapped my stomach leaving a horrible red mark!
Guy 2: Dude!!! Cherry slap.
To ejaculate in one's mouth, then slap the person across the face hard enough that the semen comes out of the person's nose (like a dragon breathing fire from the nose)