Sex position including one male and one female partner. The male holds the female upside-down and sideways between his legs (creating almost a scissor-like leg position) and proceeds to jump up and down while simultaneously jamming his raging boner into either her anal or vaginal crease. The result is a massive jizzbomb, hence the name.
Man, can you believe Peggy let Bill do the Upside-Down Jumping Jizzbomb to her at the Christmas exchange? I heard they even let people photograph them. I don't blame them, that is one challenging move!
A special move/superpower employed rarely by the jizzbomber in which an enemy is fended off by ejaculating in his/her Jimmy John's sub.
My friendpissed off the jizzbomber and was pleasantly surprised when he received extra special sauce on his JJ slim sub sandwich. He was unaware of the effect of a subteranean jizzbomb on his psyche.