* A misspelling of a real word: There's a possibility it's a typo for something like "hush-a-bye" or "hush-a-mundy".
* A slang term or regionalism: It's possible it's a slang word used in a specific community or region.
* A made-up word: Sometimes people invent words for fun or to create a unique effect.
To help me understand what you mean, could you provide more context? For example:
* Where did you hear or see this word?
* What was the situation surrounding its use?
* What do you think it might mean?
With more information, I can better help you figure out the meaning of "hushamagrundy".