It's Just that "thing" that makes an individual stand out. Captures your full attention. Side Effect- People are dumbfounded when in the presence of the X-factor.

1. An unknown variable

an indescribable quality or something; something about a person that you cannot put your finger on; je ne sais quoi

When you hitting it from the back and you cross your arms for added grip

Supposedly a singing contest, yet instead one huge joke. All it is is an unfair competition in which a young, good-looking yet naive wannabe-famous boy or girl is chosen to be the next one hit wonder popstar to generate money for Simon Cowell. The winner is usually forgotten about after a few months, becoming only background noise in the music industry, but that doesn't matter to Simon, as he does it every year. The shows are heavily decorated and the drama is over exaggerated, making it even less about the singing, and to make matters worse the judges are always people that don't actually know much about music or singing. Plus the performances are usually enhanced with pre-recorded backing vocals. And no, your votes don't count, Simon chooses who goes through and who doesn't. It's a shame how music is about money nowadays, and not emotion and expression, and The X Factor is only making it worse.

Really lame pop-music Reality TV show much like pop-idol.

Noun.
A) A quality that makes people in possession of it the epitome of cool. When trying to explain why this person is so cool you come up blank. Everyone knows this person and people like being around them.
B) Used to describe someone whos not necessarily hot but you are strangely attracted to.