The phrase blends kami, the Japanese word for god or deity, with the English expression oh my god, a mix common in anime fandom and online otaku culture. Clips repeating both languages back to back spread on soundboards and short video edits as a shorthand for melodramatic shock. Its appeal comes from sounding both sincere and parodic, so creators reuse it for reveals, jumpscares, and fandom reactions where a normal gasp would feel too flat or too serious for the joke.