ignoramus \ig-nuh-RAY-mus\ (noun) - An ignorant person; a dunce.
"I am quite an ignoramus, I know nothing in the world." -- Charlotte Bronte, Villette
Ignoramus was the name of a character in George Ruggle's 1615 play of the same name. The name was derived from the Latin, literally, "we are ignorant," from ignorare, "not to know," from ignarus, "not knowing," from ig- (for in-), "not" + gnarus, "knowing, acquainted with, expert in." It is related to ignorant and ignore.