Rejoinder; a French expression meaning "Just as well."
What it really means: "Well what you say may be true, but that's not how I see it and anyway you're missing the point."
For extra emphasis, you can preface the phrase with "mais" (which means "but").
An upscale putdown.
Considering the reputation of France in the US right now, best used only at cocktails where white wine and brie are served.
A: "He only won the silver in Turin."
B: "Mais quand meme."
The previous definition is simply wrong. This phrase means "anyway" or "whatever the case," with an implication of adversity being faced down or going ahead despite difficulties that could hinder progress.
"Quand meme, carry on."