Atfoo comes from everyday Arabic speech, where the word is said while mimicking spitting to show disgust, disapproval or contempt for a person or idea. The sound spread as a short reaction clip on user soundboards and in messaging apps, helped by its clear meaning even for listeners who do not speak Arabic. Its wet, exaggerated delivery made it easy to reuse as a punchline in memes and short videos, and it remains popular because it communicates a strong, comic rejection in under a few seconds without any setup.