Definitions by WakkaWakka101

Cum Backfire 

When in the instance of sexual intercourse, during the backward thrust the penis slips out of the vagina during the peak of ejaculation causing a misfire of semen that spurts onto the male's chest.

My wife laughed at me after my cum backfired on my chest yesterday while having intercourse.

Cum Backfire by WakkaWakka101 June 18, 2010