1. A stupid or silly person; a dolt.
2. A person whose mental acumen is well below par.
3. A person of moderate to severe mental retardation having a mental age of from three to seven years and generally being capable of some degree of communication and performance of simple tasks under supervision. The term belongs to a classification system no longer in use and is now considered offensive.
oohhh.. and for yet another first time...i've been termed or labeled as such. thanks, 'friend'.