Wow, I love it when there is a song found not in the trad and it's one I've known all my life...

And the version I know is different from all of the above!

My chorus goes something like this here:

Coy, (malinkum?) Mary
Prettiest gal that you ever did see
But her name was Devilish Mary.

We had it by Oscar Brand and Jean Richie, I think. The line about So she can't wear my britches is there. I'll see what I can scare up from the lyrics in my brain...