Now, I found one page which claims the 'original' song is bawdy...and another which says the title means "The Pump in the Barn".....so, 'pumping in the barn with my maiden gay'....?

this may be why traditional groups don't PUT the original words online.

I did find this info about someone who 'might' know. (he seems to be the contact for the group whose songs appear here.
Dallas Czech Singers
Bob Liska