An upgrade of the standard and simple word that we know as idiot.
USE OF THE WORD:
Heediot is very straight up, easy to use during the heat of an argument and is used in the same context as its lesser cousin 'idiot'. The use of this verbal attack very commonly takes a person by surprise thus giving them no response or makes them stutter which puts you in a great position to be able to strike again. Using 'Heediot' should be reserved for special occasions of extreme stupidity (using it against smartass remarks will also be tolerated).
"One plus one equals window"
"What the hell kind of a heediot are you?"