What does "Bienvenue conjoint, votre banane cre've les yeux." in french?

Please check your original. I believe you have a typo in the word "cre"ve".

Welcome mate/spouse, your banana(or ...) is blindingly obvious/noticeable.

The phrase "Bienvenue conjoint, votre banane cre've les yeux" does not have a clear meaning in French. It appears to be a mixture of words without a coherent sentence structure. The words used in the phrase include "bienvenue" (welcome), "conjoint" (spouse), "votre" (your), "banane" (banana), "cre've" (which is not a recognized word in French), and "les yeux" (the eyes).

To better understand the intended meaning behind a phrase or sentence in French, it is important to consider the context, grammar, and vocabulary used. However, in this case, it seems that the phrase you provided may not have a specific meaning or a complete sentence structure.