a. Anyone who uses more than 5% of the examples of "words" presented in this dictionary when addressing another person.
b. Someone too lazy to learn proper grammar, thus needing to create fragments or unnecessary augmentations of established words when struggling to communicate.
c. A person who makes up words to describe events, emotions, objects, actions, etc. Usually done in an effort to sound original or intelligent - see separate entry paradox
Read a book. Playboy and Hustler magazines do not count. If you were not born that way, you do not have to be retarded.
It’s not a “slang” or some other shit. You shouldn’t ever really use it, it’s offensive and a horrible word. The real meaning is less advanced in mental, physical, or social development than is usual for one's age.