Yeah, a male or female of noun class one (language users), assuming males and females exist, which, of course, they do because the Great Bird had to put his skimpy costumes on someone. ;)
Klingons are people too! We use words like "people" and "women" to refer to female Klingons as well as female humans. In English I would say that Mara is a woman, but she is a Klingon woman, not a human woman - but in the most literal translation I suppose the Klingon would say something like, "Klingon female" or "human female". You could also have targ females, sark females, v'gro females, etc.
It's a philosophical question, I suppose. I might be willing to extend the term to any species that would look good in a miniskirt (which should be a fundamental classification in Star Trek), but I am loathe to use the term for a Horta, Denevan neural parasite or Tholian female, for instance, even though they are clearly articulate, and form their plurals with -pu' in Klingon, I assume. If my cat were to start talking, I probably still wouldn't call her a woman, even though she is probably more closely related to me than a KIingon female is. Of course, I suppose the TNG episode "The Chase" would indicate that my cat is indigenous to Earth, while I am some sort of invasive species, as Klingons are on QonoS, unlike the native targ. I have always tried to ignore that episode, though.
Leaving aside any arguments as to what counts as a copula and what doesn't, the pronoun in a sentence like this is acting as a copula. The SoH here means "you are" and can take some verb suffixes when acting that way. Mara SoHbe' would mean, "you are not Mara." Since the negating suffix -be' cannot be attached to a noun, appearing, as it does here, without a verb, means it must be the noun be' "female". "It is not you," is a very weird thing to say, but I suppose SoH 'oHbe' is grammatical and matches in both meaning and weirdness.
Thanks for the confirmation, jd. I realized a short while after posting that that the -H suffix on the pronoun acts as the copula in this particular case, so it's SoH that the negating suffix should be attached to. That's been happening to me a lot lately; slowly but surely, Klingon is really beginning to get into my head.
"It is not you" IS an odd thing to say, granted, but as usual, we can come up with a potential situation where it might occur if we look hard enough for one: "Something is blocking my light. Mara, it's not you."
(Leave it to me to come up with a convoluted scenario under which an unnatural sentence might be used, if only to prove that such a scenario does indeed exist. I'm kind of the queen of finding such out-there scenarios.) ;-)
In Klingon, that pronoun (if that's what we want to call it) is essentially treated as a verb, taking all the verbal endings. I think what you are suggesting would be "mara, SoHbe'." Actually, it might even be "mara, SoHbe' oH'e'," so I guess I should leave it up to the experts to clarify this.