Here's why:
* "Je suis dans" means "I am in" or "I am into."
* "avec" means "with."
* "seulement" means "only."
* "tus" isn't a valid French word. It might be a misspelling of "tu" which means "you."
Possible interpretations:
If the phrase is meant to be in French, it's likely a misunderstanding or a mistake.
If it's a slang phrase or part of a specific context, then it's hard to decipher without further information.
Please provide more context!
To understand the meaning, I need more context:
* What was the full sentence or conversation?
* Who said it and to whom?
* What was the situation?
With more information, I might be able to help you understand the intended meaning.