A retarded alien is a species that originates from the planet Zorb in the upper quadrant of the Milky Way. The species is generally short, and is similar in appearance to the grey alien. However this species lacks the proper intelligence of the average alien. Usually these aliens would go to earth and probe mindless people by experimenting how wide the human asshole can stretch. They can be spotted over the skies over the southern region of America. Signs of abduction include:
Nausea
Head aches
Graver
Ass hole pain
Sudden loss of genitalia
And an extreme interest in the Star Wars character Jar Jar
Person 1: I think I was abducted by a retarded alien?
Person 2: Oh really?
Person 1: My asshole can stretch farther than 8 inches now.