Greys (or Grey Alien, Alien Greys,or Grays) are a race of aliens with gray skin, sighted in the United States. The idea of the Grey comes from probably the most famous alien abduction, the Betty and Barney Hill abduction.
Greys are typically described as being tall and skinny. They have no clothes, most of the time being naked, and have big heads with big black eyes and slits for mouths. Some descriptions say they lack ears, noses, and mouths. They also have no sign of hair anywhere on their body. They may have small openings for noses and ears, though.