Arrasou comes from the verb arrasar, which means to devastate, destroy, or crush. It's a strong and evocative word that conveys intense emotional impact.
In the context of the song, the singer uses it to describe the profound pain and emotional destruction caused by a past love, singing "Tira esse golpe que me arrasou" (Take away this blow that crushed me). It perfectly captures the feeling of being utterly heartbroken and overwhelmed.
"Tira Ela De Mim" is a plea to be emptied of someone. The singer has been left by a woman whose love turned out to be built on lies, and instead of asking for her back he asks for every trace of her to be removed: the memory she left, the emptiness she left behind, the sky full of stars she took with her.
The chorus is a list of places she still lives. She is in his dreams, in the desire to be with her, in his heart, and even in the way his body still feels her. So he asks someone new to help him overwrite all of it. Kiss the mouth she kissed. Go where nobody has ever been. Take her out of me.
The second half turns toward recovery. He wants the blindfold that kept him from seeing the truth taken off, and the blow that flattened him taken away too, because he has decided there is always room for a new love and that happiness matters more than what he lost.
This is the live pagode version recorded in Belo Horizonte, with Alexandre Pires joining Felipe Araújo, which is why you hear the shout-outs to the crowd in the middle of the song.