Desgrama is a colloquial and somewhat informal term, often used to express exasperation or to refer to a difficult or annoying situation or thing. It's a more colorful way of saying "damn thing" or "mess."
In the song, the lyric "É que depois que ele foi embora dessa desgrama" translates to "It's just that after he left this damn thing (or mess)." Here, "desgrama" refers to the situation or the house/life after her partner left, highlighting her frustration and the negative impact of his departure.
Have you ever been so tired of being single that you wanted to sell your bed? In "Negócio Na Cama," which translates to "Business in Bed," Priscila Senna and Mari Fernandez sing about this exact feeling. The singer can't stand looking at her bed anymore because it reminds her of an ex-lover. So, she comes up with a clever plan: she advertises her "almost new" bed on social media, saying the highest bidder can take it.
But here's the twist! She's not actually selling the furniture. The "business" she's proposing is a playful and flirty invitation. When she asks, "Quer fazer negócio comigo na cama?" ("Do you want to do business with me in bed?"), she's inviting interested people to send her a private message, not to buy the bed, but to join her in it. It's a witty song about moving on from a breakup and finding a fun way to deal with loneliness.