Reading Ellery Queen's The Murderer is a Fox, I came across this passage:-

When Fox asked me on the phone to deliver a bottle of 100 aspirins, I said: "Say, Mr Fox, what do you do with that stuff - eat it?" You know, cracking wise. But he gets sore and wants to know what "right" I have talking to him "that way", and a lot more gilhooley like that.

I can guess from the context what it means (something similar to codswallop, I'd say). But I can't find out anything about the word. Green's Dictionary of Slang doesn't have it, and the only definitions I can find on-line are proper names. Can anyone confirm what it means, and offer an etymology? Or is it just a nonce word?