Jupiter Coconut Cyclone was an attack used by Sailor Jupiter in the manga, musicals, and video games.
Manga
In Act 24 of the manga, it was an electric attack used to destroy a Daimon. This attack was also used in a side-story, where it looked like a blast of energy that Sailor Jupiter fired from her hand as wind surrounded her.
Musicals
This attack was firs used in the musical Sailor Moon S - Usagi Ai no Senshi e no Michi, where it was used to destory two of the Death Nightmares.
Video Games
This attack was also used in the video game Sailor Moon: Another Story, the Sailor Moon S fighting game, and the Sailor Moon SuperS fighting game. In fighting games, it looked like a ball of lightning that would generate an electrical storm upon impact with an enemy or the ground.
Trivia
Though this attack was never used in the anime, when Sailor Jupiter used it in the video game Sailor Moon: Another Story, it was voiced by Emi Shinohara.