Down syndrome
Asian
Asiatic
changeling
cretin
half-wit
idiot
imbecile
moron
retard
bunchof
coarse-minded
double-distilled
double-dyed
drug-crazed
dumbstruck
florinian
gibbering
hairbrained
hydrocephalic
microcephalic
polka-dotted
rat-faced
renter
stoner
talk-show
tarnal
thumb-fingered
unexpurgated
untalented
vacant-eyed
vapouring
weak-willed
wool-headed