* Mon cher: This is French for "my dear." It's a term of endearment used for someone you are close to, like a friend, lover, or family member.
* Vada: This is a word with various meanings depending on the context. It could be:
* Vada pav: A popular street food in India, consisting of a deep-fried potato patty served in a bun.
* Vada: A general term for a savory, deep-fried snack in South India.
* Vada: A surname or a common name in some cultures.
Therefore, "mon cher vada" doesn't make sense as a single phrase in French or any other language.
It's likely a combination of two words that you came across separately.
Do you have any more context about where you encountered this phrase? It might help to understand its meaning better.