Figas are good luck charms or, more colloquially, the act of crossing one's fingers for good luck. It often refers to a specific hand gesture where the thumb is placed between the index and middle fingers, meant to ward off bad luck.
In the song, the singer says "Faço planos, faço figas" (I make plans, I cross my fingers). She's daydreaming about her crush, and this word beautifully captures her feeling of desperate, almost superstitious hope that her romantic fantasies will come true.
Have you ever had a crush on a friend who doesn't see you that way? It can be super confusing! In her song 'Mais ou Menos Isto,' which means 'More or Less This,' Brazilian artist Rita Rocha perfectly captures this feeling. She's fallen for a guy who is with someone else, and he seems to have no idea about her feelings. It's a classic story of unrequited love, where she has to watch them hold hands and pretend she's okay.
Throughout the song, she realizes that this painful, complicated emotion is exactly what her mom and everyone else described when they talked about being in love. She'd rather keep him as a friend than risk losing him completely by telling the truth, so she daydreams about a different reality. The song explores the bittersweet choice of preferring a 'dream to nothing,' because if a romance never starts, it can never end and break your heart.