Juízo can mean "judgment" or "sanity", describing someone's clear thinking and sense of control over their own mind.
In "Tudo sujo de boy teve meu juízo se foi" ("all dirty boy had my wits gone"), the word marks the moment the singer loses her composure completely, swept away by feelings she can't control.
Negra Li's "Meu Juízo" is all about that feeling when someone's smile just completely takes over your mind. The lyrics, "tudo sujo de boy teve meu juízo se foi" [everything dirty from a boy, my judgment was gone], really set the scene, showing how this person's presence can make you lose all sense of reason. It's like their smile has a magic power, making everything else fade away.
This song beautifully describes being so captivated that you can't imagine life without them. Lines like "não consigo viver sem por isso te digo coração história quase ficou fora só de imaginar nós dois" [I can't live without it, that's why I tell you, heart, the story almost got out just imagining us two] show that deep connection. It's about wanting to spend every moment with them, whether it's a quiet night under the moon or just watching the time pass by, letting that special feeling take over. "Parece que a gente flutua" [It seems like we float] perfectly sums up that dreamy, weightless sensation of being completely smitten.