Here are some possibilities:
* Yummy: This is the most likely option, meaning delicious or tasty.
* Jimmy: This is a common name for a person.
* Jumpy: This means nervous or agitated.
* Jamboree: This is a noisy celebration or festive gathering.
To understand the intended meaning of "jummy", you need more context. For example:
* What was the sentence or conversation where you encountered this word?
* Who said it?
* What was the context of the conversation?
Please provide more information so I can help you determine the correct meaning!