Listed in Portuguese as Vaias, meaning boos, this clip belongs to the long tradition of stock crowd reaction sounds used in radio, television and theatre to signal a flop without showing an audience. Online it spread as a reusable meme sound because the elongated uuuu is instantly understood across languages, even without words. Creators in gaming, sports edits and reaction videos use it as shorthand for collective disapproval, pairing it with fails or rival sounds like the spongebob fail for extra comic timing.
About this sound
A loud crowd booing sound effect with drawn out uuuu boos, used for fails, bad jokes, unpopular takes and disappointing moments in videos and streams.
This sound is a full crowd turning on a performance, with dozens of voices booing together in a long, sustained uuuu that rises and falls for about eight seconds. It is not a single person but the roar of an audience showing disapproval, disappointment or mock outrage all at once. The drawn out vowel makes it feel theatrical rather than angry, which is why it lands as comedy. Dropped over a mistake, a terrible pun or an embarrassing reveal, it instantly turns the moment into a public flop and lets viewers join in the jeering.