The 'E E Ei' meme, often associated with the 'I'm a Mango' sound, originated as a viral audio clip on TikTok featuring a high-pitched, auto-tuned voice repeating rhythmic, nonsensical syllables. It quickly became a staple of 'brainrot' culture, a genre of internet humor characterized by surreal, fast-paced, and often absurd imagery. The sound is frequently paired with low-quality images of animals—specifically monkeys or cats—or bizarre CGI characters. Its popularity stems from its catchy yet chaotic nature, making it a go-to choice for creators wanting to express a sense of pure absurdity or over-stimulated humor in their digital content.