MacColl & Seeger's Travellers Songs of Eng & Sc has 'Queans'in its glossary as 'young women', but I'm sure I've seen 'Quoims' somewhere authoritatively stated. I've been singing it for 40 years and never really understood what that line was all about.
If MacColl adapted it from a traveller original funny it never appeared in the aforementioned book???Hmmm! It's 100% radio ballad.