Place it at the end of a failed reveal or bad take, after the setup has fully landed, then follow it with the Bruh sound and the Emotional Damage sound to close the roast.
Über diesen Sound
Lixo Nuclear is a six-second meme clip named for nuclear waste, using that blunt Portuguese label as its whole punch. It lands as exaggerated disgust, the kind of over-the-top dismissal for something so bad it feels hazardous, and its short length keeps the joke sharp instead of letting it drag.