Klingon doesn't have a word for it, of course -- yet. I suppose they would Klingonize this as something like *'u'matlh* ooor *'u'motlh*. So, although it's a Ferengi thing and not a Klingon thing, should Klingon have a word for oo-mox?
English doesn't even have a word for it. There's apparently no Betazed word for it either. I doubt Klingon would have -- or want -- a word for it. As you say, it's a Ferengi thing.