(Offensive slang)
used as a disparaging and abusive term for a person who has
intellectual disabilities, originally
US.
By extension, you can use this word to describe a person who is extremely foolish, dumb or stupid.
Retard usage
Note: this word is pronounced as ‘
REE-
tard’, not ‘ri-
TARD’ (inoffensive sense for delay or slow down).
Note: this word is outdated and considered offensive and the senses above should be avoided.