Usually used, as most French terms - je ne sais pas, ennui, to describe that certain something that is beyond normal language.
Nowdays it is often referred to (incorrectly) as X-factor
However Savior faire suggests a certain style, accomplishment and refinement. A person who has Savoir faire is naturally suave and classy, or has the innate abiilty to do or say the right thing at the right time.
The great Irish wit, Oscar Wilde, has considered to have Savoir faire, although he probably would have said that he was more Laisser faire (i.e. lazy, disinterested or libertine)
or in a more modern context;
The actor George Clooney can be said to have Savoir faire
The personal adjective for when one gives no fucks because in the end, even if they have no possessions or money to their name, they have street smarts that will let them not only survive on the street with nothing, but thrive.
"Why should i worry? why should I care? I may not have a dime, but i got street savoir-faire!" - Pongo, Oliver and Company
Someone who jumps from one relationship immediately into another one.
Serial monogamists can not stand to be alone and often suffer from vast commitment and insecurity issues.
Because they jump into relationships immediately after the previous one has ended, serial monogamists typically don't take the time to reflect on their behavior or why their previous relationships failed; thus, they end up making the same relationship mistakes over and over again.
Person 1: Damn, Dustin already has a new girlfriend?! It's only been two weeks since he broke up with his fiance! I think he's a sociopath.