1. Idiot
2. Mental Incompetent.
3. Stupid Person

A person who is a complete idiot, is not just doing 1 idiotic act, which would only make them an idiot. To be a complete idiot you must perform a series of stupid actions.
Uncle: Look at that man, he just finished playing 'ding-dong-ditch' on his own house.

Neighbor: Oh, don't worry about Dale, he is just a complete idiot.
by Dictify May 26, 2008
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Exactly as the name suggests. This person is so incredibly stupid, that he has no understanding of anything whatsoever, therefore making this person nothing else but a waste of oxygen.
Hey, do you like John?
-No, he is a complete fucking idiot.
by Asshoul October 03, 2020
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