Ignoramus

Ignoramus [ig-nuh-rey-muhs] noun:
An extremely ignorant person.

Neologism

Neologism [nee-ol-uh-jiz-um] noun:
A neologism is word, term, or phrase which has been recently created ("coined") —often to apply to new concepts, or to reshape older terms in newer language form. Neologisms are especially useful in identifying inventions, new phenomena, or old ideas which have taken on a new cultural context.