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!