Pretty strange because I saw a UFO!!!!!!!!!!!!!!!

X in american culture are black suited people who says to be officials from govt who threaten  people who saw any alien sightings to maintain silence quite on  their experience.It is widely debated that they might be aliens themselves.The term is also used to describe people working in secretive organisationsIn general the term is used for any harassing behavior in UFO found zone

Answer-Men In Black
Cracked by Indian,Nandu,Muhamad,Vishnu Menon