For some time now, some of my on-line friends have advised me to provide a version of CassidySlangScam without the invective aimed at Cassidy and his supporters. In response to that advice, I am working on providing a glossary of the terms in Cassidy’s ludicrous book How The Irish Invented Slang with a short, simple and business-like explanation of why Cassidy’s version is wrong.
In his work of false etymology, How The Irish Invented Slang, Daniel Cassidy claimed that the word jackpot derives from the Irish word tiach along with the English word pot. As we have seen with the word jack, tiach does not mean money and it sounds nothing like the English word jack.
Furthermore, it is widely accepted that jackpot is a poker term derived from the card, the jack. Follow this link for further details: https://www.etymonline.com/word/jackpot