Spongesexual Share definition Flag A sexuality regarding the show 'Spongebob Squarepants', started in the musical community because the actor is an absolute hottie named Ethan Slater. Friend: I'm homosexual, how about you? Me: I'm spongesexual. Friend: What the fuck- Spongesexual by ThySmallestOfTheCacti June 17, 2018 Get the Spongesexual mug.