Hygge
Pronounced hoo-gah. A Danish word that describes a situation in which people feel content and relaxed. Hygge usually suggest an informal, pleasant sit-down with friends, a relaxing stroll, etc. The term isn't normally used to describe intense activities or ones that rely on materialistic things.

The fact that hygge does not have a proper translation to almost any language, is often taken to suggest that it's a deep and unique part of Danish culture, that foreigners find hard to grasp.
Danish person: Hey, you're invited to hygge at my place tomorrow!
Tourist: What's on the agenda? getting drunk? board games? a movie? a meal?
Danish person: Umm.. no.