What Is a Creme-Me-Air?

When I first moved to France, do you know what it is in French? It's a creme-me-air. No, I've never thought about it before. Creme-me was an old word that no one uses anymore. So it's sort of useless. You only use it for housewarming, but it's like, what does it mean? Just leave a comment on teacher-loop.co.uk with your views on the welfare system.