savoir faire

 
Pronunciation: /ˌsavwɑː ˈfɛː, savwaʀ fɛʀ/

noun

[mass noun]
  • the ability to act or speak appropriately in social situations: this is a gracious occasion, so try to behave with a bit of savoir faire

Origin:

early 19th century: French, literally 'know how to do'