Definitions for earthlingˈɜrθ lɪŋ
Random House Webster's College Dictionary
an inhabitant of earth; mortal.
Origin of earthling:
tellurian, earthling, earthman, worldling(noun)
an inhabitant of the earth
An inhabitant of the planet Earth (Generally in science fiction aliens who use the term Earthling look down on the people of earth.)
an inhabitant of the earth; a mortal