On the other hand, ancient hebrew is not English at all. To assume that the enlish phrase and the ancient hebrew phrase meant the exact same thing is too much of an assumption.
How about 'eating the grass twice'? Rabbits do that. It is just that they eat their own pellets to process the cellulose twice, since it is so hard to digest.
It provides the same function as 'chewing the cud'. .. just a bit more unappitizing to use humans.