The phrase refers to Gojo Satoru from Jujutsu Kaisen, and it spread online through fan edits, recap clips and reaction posts built around the character's sealing. Because Gojo is known as overwhelmingly strong, the idea of him being sealed became a ready-made punchline for any sudden reversal. The sound still gets used in anime communities and general meme edits whenever someone dominant is unexpectedly stopped, contained or written out of the action for dramatic effect.