* It's a regional slang or dialect term: This is the most likely scenario. There may be a specific region or community where this term is used and understood.
* It's a mishearing or misspelling: It's possible you heard or saw something that was actually a different word, and your memory or interpretation has resulted in "chee chalker."
* It's a fictional or invented term: Maybe you encountered this term in a book, movie, or other fictional work.
To help me understand what you're looking for, please provide more context:
* Where did you encounter this term?
* What was the context of its use?
* Do you have any idea what the term might refer to?
With more information, I can hopefully help you find the origin of this term.