While it's easy to re-dirtify Hugill's "camouflaged" lines, it's usually impossible to hit on the real words. Just because something "seems to fit" doesn't make it real. And sometimes he suppressed entire stanzas.

What's more, chanteys of more than a century ago lacked certain modern idioms and sometimes employed now-obsolete or unfamiliar ones.

And finally, as Gibb suggests, working sailors' tastes in bawdry (and beyond) did not always match those of today's middle-class folk audiences.