Ugh, the Engrish.

There's only two things that "beater" should ever apply to:
One is someone who is...one-eye snake charming. Two is someone who runs into bushes to flush out game for hunters. I'm hoping that Kirito somewhat ends up being the latter. I expect he won't be teaming much after the word gets out, except for Boss battles. But he could at least run around all sneaky and help out other players while they are leveling on a floor.

I guess the other direction they could be going is that he's the one who will beat the game ultimately, so he's a "beater" of challenges.

Still super awkward.

From Asuna's speech about not wanting to just be sitting around in the first town, I take it most of the other actually female players stay out of danger the majority of the time. Maybe they spend most of the time playing as Smiths or Merchants like Ragnarok Online or something. There's no magic, but there are tons of skills. I assume that means not only combat-oriented ones.