Variations of the stunned oh my god reaction have circulated on soundboards for years, with this 'muh' version standing out for its deliberately slurred delivery. It spread through meme edits, short form videos and gaming clips where creators need a quick disbelief cue, often alongside similar reactions like oh my god, wow in compilations. Because the phrase is instantly understood even when distorted, it works without context, which is why it keeps being reused for reveals, fails and cringe moments instead of fading with a single trend.