A spell used in Final Fantasy VII by the final boss Sephiroth. He summons a massive comet into the solar system, which proceeds to demolish the outer planets up to Jupiter. It then crashes into the sun, causing it to go supernova and destroy Mercury and Venus. As the sun continuously expands toward Earth, Sephiroth basks in the sun itself, while your party is damaged heavily. The animation for the spell takes nearly 2 minutes to complete.
After a hard night at the bars/clubs with no luck, a man will return to his abode and cry. While he is crying, he will whack off to internet porn. At the moment of ejaculation, a tear might hit the semen in midair. This magical moment is called a supernova.
Last Sunday at 3 AM I felt a great disturbance in the force, as if a million voices cried out in terror and were suddenly silenced. I fear a supernova has happened.