Moron
Part of speech: noun
Definition: A person of borderline intelligence in the former classification of mental retardation, having of an intelligence quotient of 50-69. A person who makes uncool, unfunny, uninteresting, or irrelevant (see lame) attempts to impress others and draw attention to himself, especially in a flawed attempt to act like someone else. An idiot.
Example sentence: Some people think I'm a total moron and I would hope most people think I'm very good at what I do.
Half-wit
Part of speech: noun
Definition: A person of around half the average intelligence of his or her peersA stupid or inept person