A replacement for the word "twenty".
Now my story begins in Nineteen-dickety-two. We had to say "dickety" because the Kaiser had stolen the wold "twenty". I chased that rascal to get it back, but gave up after dickety-six miles.
In the Simpsons episode entitled "The Curse of the Flying Hellfish", Grampa Simpson uses it in place of the word "twenty" to recall his initiation into a gang called the Hellfish. His reason? The Germans stole "twenty" from them.
"Now, my story begins in nineteen-dickety-two..." ~ Abe Simpson