[[twee handen op één buik]]

Could you have a look at this, maybe? The etymology is a bit strange, although I can't say that it's wrong. I've never heard the expression, actually. But the etymology given is based on some nobody's opinion in an internet forum. That would have to be deleted at any rate, I guess. The legitimate source from onzetaal says nothing about "beuk", nor does this: http://www.etymologiebank.nl/trefwoord/buik.

I don't really know anything about it either.

Ok. In that case I'm deleting the etymology. It's based on useless sources and more reliable sources mention nothing of the same kind.