I have vague recollection of the word slubberdegullion in a childrens story I used to love, Avy.

I have looked for it on internet, but not remembering the title, its been a difficult search.

From memory, the story was about a girl who had gold (maybe) coins, spilling from her mouth when ever she opened it and (maybe her sister) who wasn't so nice...when she opened her mouth, foul word spilled forth....like slubberdegullion etc. I wish I could find it again!