noun. A member of the racial classification of humanity composed of peoples native to North Asia, East Asia, Pacific Oceania, and Greenland, as well as their diaspora in other parts of the world.

noun. Someone with Down syndrome.

noun. Idiot, retard – general term of abuse, due to association with Down syndrome.

"The term mongoloid was based on the supposed resemblance between their facial features and Asian ones."

mong  mongo  

arrested  babbling  backward  blithering  burbling