Charley, my cousin grew up in South Africa and used to sing an Afrikaans song that may be your missing verse. I heard it back in 1969 and I haven't a clue how it should be spelt but the phonics in my memory go something like this:

Oh, ill ma trass and ma pa trass and ah lady dum,
Ah lady dum, ah lady dum,
Oh, ill ma trass and ma pa trass and ah lady dum,
Ah lady dum, ah lady dum.

Which she reckoned meant:
Your mattress and my pillow and there lies the thing.!!!

A bit risque for a young lass but I was teaching her to play guitar and that was one of the few songs she knew and there wasn't time to teach her many new ones.
Robyn