Esnobou comes from the verb esnobar, meaning to snub, scorn, or look down on someone or something. It's a less common verb than simply saying "you ignored" or "you didn't care," making it more impactful.
In the context of "Se Não Valorizar," the singer uses esnobou to express how her partner disregarded or disrespected her feelings. She sings, "Você esnobou meus sentimentos" (You snubbed my feelings), highlighting the pain and indignation caused by her partner's dismissive attitude.
"Se Não Valorizar" is Solange Almeida and Márcia Fellipe's live duet warning a partner not to take love for granted. Over a forró beat, the singer lays down an ultimatum from the first line: "Se não valorizar, com certeza cê vai me perder" [If you don't value me, you'll surely lose me]. She's done making excuses for someone who keeps snubbing her feelings only to show up later full of regret — "Você esnobou meus sentimentos, depois voltou com seus lamentos" [You snubbed my feelings, then came back with your regrets] — and she's decided her own self-respect matters more: "Me amo, mais do que a você" [I love myself more than I love you].
By the last verse she's given away her whole heart and gotten only an illusion back — "Entreguei o coração, você ficou com tudo, uma ilusão pra mim" [I gave you my heart, you took it all, it was just an illusion for me] — and the song closes on the same blunt warning it opened with: value her, or lose her.