Further to Debbie's misbelief about wally (gherkin) I can confirm that she was right. In certain parts of the country a gherkin is indeed a "wally",as the article below mentions briefly.
http://www.quinion.com/words/articles/nellie.htm
And also here
http://www.peevish.co.uk/slang/w.htm
Hope that helps.
A childhood belief about gherkins

others believed things like this
- I use to believe that my grandpa invented the wall because his name was WallyAnon
- Up until 5 seconds ago, I had no idea wat a gherkin was— It's a little cucumber, stupid!
- I used to think that a gherkin was some kind of piece of machinery. I wonder where I got THAT from...— Some Idiot
- Little Debbie put her boogers in her oatmeal piesAnon
- I thought a highwayman was just someone who helps pave the road and stuff like that— Nate
- I used to think Cockneys only ever talked in rhyming slang.Anon