What the dickens is Doozandazzy?

In the book, Informal English, by Jeffrey Kacirk, the word "doozandazzy" is defined as "Something, the name of which cannot be readily recalled." I'm not sure why I picked that name, but it seemed to fit. I tried a bunch of other names: "What in the dickens?" "moonglade" "izickity." None really struck a chord. I have a feeling a lot of I will post here is about words and phrases we don't use very much anymore. They fascinate me.