Here's a breakdown of why:
* "Un sallie" doesn't exist as a word in French. It might be a misspelling of "une salle" which means "a room."
* "De classe" means "of class," typically referring to a school class or social class.
Possible Interpretations:
* "Une salle de classe" means "a classroom." This is the most likely interpretation if "sallie" was a misspelling.
* "Une sallie de classe" could be a slang term or a phrase from a specific region or subculture. Without more context, it's impossible to know for sure.
To understand the meaning, you'll need more context. Could you provide the full sentence or paragraph where you encountered this phrase?
Let me know, and I can help you figure out the meaning!