Loki is not a portuguese word! It doesn't show up in any portuguese dictionary. But it's a kind of neologism that mean Louco (the portuguese word for Crazy). The funny thing is that on the art cover of the record we can read Arnaldo Loki? Baptista, because some people at the time used to say that he was Fried (if you know what I mean) ;-)
So, the implicit "question" of the title (Arnaldo Loki? Baptista) is a thing to consider while listening to the record.