"Rabiosa" can also be translated as "crazy," and "aruñar" (a colloquial form of "arañar") as "to claw." This isn't translated literally, because some phrases do not have direct literal translations. Also, the way the lyric is written is not gramatically correct, but rather written as it would sound. For example, "pa mi" should really be written as "para mí" ("pa" is a short form of "para"). All that aside, hope this helps!