A variant or dialect form possibly referring to a giblet (edible organs of poultry) or an irregular lump or protuberance.
Possibly a dialectal or variant spelling related to 'giblet' or 'gerbil,' though the exact etymology is unclear. It may be a regional English dialect term with uncertain origins.
Some words like 'gibbol' are so obscure and dialectal that even etymology experts aren't totally sure where they came from. These are the fossils of English—remains of old local speech patterns that survived in documents!
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