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.
Cassidy points out that the word slob in English probably derives from the Irish slab or slaba, which is defined by Dinneen as:
slab, -aib, m., mud, mire; a soft-fleshed person.
Cassidy says that this is from the Scandinavian word slab (quoting from MacBain’s Gaelic Etymological Dictionary).
There is probably a connection with Anglo-Irish, as Cassidy says, but this claim did not originate with him. For example, the link between slob and Irish slab was made by Loretto Todd in her book, Green English, which came out seven years before Cassidy’s book.