Tin ear

I was sitting here listening to Christmas Carols, and I'd like to nominate the second verse of 'O come All Ye Faithful' for the worst bit of doggerel in the hymnal. In particular, the line
Lo, He abhors not the Virgins womb
is dreadful. It is hard to parse, uses obscure words badly, brings up a rather nasty mental image, and doesn't even scan.