The clip's file metadata identifies it as coming from Programa Jurandir Mitoso, broadcast on Rádio Cidade AM 860 kHz in Fortaleza in April 2015. In Portuguese, a maior baixaria roughly means the greatest vulgarity or low behaviour, which explains why the phrase works as a judgement rather than a neutral sound effect. As a soundboard clip, it circulates mainly as a short reaction for Portuguese-speaking creators, who use it to label a moment as shameless, crude or scandalous without adding a longer commentary track.
关于此声音
A Brazilian radio clip from Jurandir Mitoso's 2015 Fortaleza show, saying a maior baixaria, used as a reaction to vulgar or scandalous moments in memes.
This is a very short Portuguese voice clip taken from a Brazilian radio broadcast, in which a speaker delivers the phrase a maior baixaria with a sharp, judgemental tone. Lasting under two seconds, it sounds like a quick radio aside rather than a song or a designed effect, with the emphasis falling heavily on the word baixaria. Dropped into a video, it works as an instant verdict on something vulgar, shameless or absurdly low, letting the listener hear the disapproval without needing a longer explanation or subtitle.