What is a cockelled egg?

There is no known term or concept called "cockelled egg." It's possible you might have misheard or misspelled a word.

Could you please clarify what you mean? Maybe you were thinking of:

* "Cackled egg": This is a humorous term, referring to an egg laid by a hen that makes a loud cackling sound when she lays it.

* "Coddled egg": This refers to an egg that's been cooked in hot water, but not boiled, resulting in a soft yolk and a slightly firmer white.

* "Checkled egg": This is a made-up word, but it could refer to an egg with a cracked shell, or an egg that has a distinctive pattern or marking on the shell.

Please provide more context or a different spelling so I can assist you better!