What does Hollcock mean?

"Hollcock" is not a recognized word in standard English. It is likely a misspelling or a word specific to a particular dialect or region.

To understand what you might be looking for, could you please provide more context?

For example:

* Where did you encounter this word? (a book, a conversation, a website, etc.)

* What is the surrounding text or conversation?

* What do you think the word might mean?

With more information, I might be able to help you decipher the meaning.