Ed Motta is a Brazilian singer and musician whose expressive voice has made short excerpts of his speech popular as reaction sounds in Brazil. Peraí is a colloquial contraction of espera aí, meaning wait there, while bicho is informal Brazilian slang for a guy or mate. Together the phrase sounds like a friendly but firm interruption, which is why Brazilian creators reuse the one-second clip in memes, streams and group chats whenever someone needs to be stopped mid-sentence.