1. "Mon Coeur Et Rien De Plus"
* This translates to "My heart and nothing more". It suggests a deep emotional connection and a lack of material desire.
2. "Mon Coeur Et Rein"
* This phrase is more obscure and doesn't have a common meaning in French.
Therefore, the complete phrase "Mon Coeur Et Rein De Plus Rien" is likely a misinterpretation or a poetic play on words. It's impossible to give a definitive meaning without further context.
It's best to consider the possible meanings of the individual parts and the overall context in which the phrase appears.