What does yum sup mean in Chinese?

"Yum sup" is not a phrase in Chinese. It's likely a misspelling or a made-up term.

If you meant to say something else, please provide more context or the correct spelling.

For example, you might be thinking of:

* "Yum cha" (飲茶) which means "drink tea" in Cantonese and refers to the traditional Cantonese custom of having dim sum.

* "Yum" ( yummy) which is a borrowed word from English meaning delicious.

Let me know if you can clarify what you meant! 😊