a conversation between me and my sister (forgive the bastardized spelling)

(I wake up from a nap. It's nighttime. My sister has already headed to bed, in the room we share.)
Hoov: Oh, I'm sorry, I forgot you were going back downstairs and I turned the lights out.
Me: mox nix

(I then, on my way out of bed, trip over the clutter on my floor)
Hoov: mox nix?
Me: yea, its dutch for matters not/no matter
Hoov: Oh, I thought you said nix nux
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(nix nux means... kind of like airhead/klutz)
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hahahaha very funny hoov. But actually, the funny part was, she seriously thought I said nix nux.