Is "ckabglans" in use elsewhere? A word-list linked from the Wikipedia page on Back Slang gives "kacab genals."

I do recommend both the external links at the bottom of that Wikipedia page. The list of back slang vocabulary mentioned above links to a collection of other amusing word lists and games. The other link yields one of a great collection of thoughtful and researched articles on Victorian culture (music included).

The Wikipedia page above also compares the French slang "Verlan" (a self-referential alteration of "l'envers") which reverses words phonetically, syllable by syllable. In English I guess we might discuss "coaf yoomkis" and "co-frawl" here at the "Dumtac A-fack" using a verlan-like back slang.