Raman (Plural Ramen) is one of Demosthenes' branches on the Hierarchy of Foreignness. A raman is "the stranger we recognize as human, but of another species." Years after their destruction, the buggers were identified as ramen.
Although not a common word, may be constructed in Swedish from rå + män, where rå indicates "coarse (not refined); brutal (crude or unfeeling in manner or speech)" and män = "man" or "person." (See this comment at the blog post "6 Made Up Nerd Words That Made it to Common Usage, and 8 That Should" at The Mary Sue.)