The name refers to the egg trucks that drive through Brazilian residential streets, broadcasting sales announcements from a loudspeaker so residents know fresh eggs are nearby. Those trucks have become a familiar part of daily life in many neighbourhoods, and short recordings of their announcements are widely shared as jokes and reaction sounds on Brazilian social media. The humour comes from recognition: the sound is ordinary at home, but absurd when it suddenly appears in an unrelated video, which is why creators keep reusing it for surprise entrances and interruptions.