x-factor
the special unspecific talent that separates a few from other, normal people (usually used in the performing arts)

– examples:

I don’t know what it is about Anne, she just seems to have the x-factor. I mean, her singing isn’t great, and her dancing is often out of time, but people seem to love her.


x marks the spot
a mark that states where something is hidden or buried

– examples

There are some stones in a strange formation here – I guess X marks the spot. Let’s try digging here. [


x-rated
not suitable for children or people who are easily upset (usually containing sex, violence, or disturbing images)

– examples

“I saw the video: man, that thing should be x-rated. Some absolutely disgusting stuff there.”