There are two meanings :

First the person is an idiot and it was confirmed by many people or just an evidence.

The other meaning is that, the person is certified in a study or a job. But this person doesn't really deserve the title.
1. She even failed to the easiest test ! she is a certified idiot.
2. Although he has a degree in business administration, the enterprise is bankrupt. He is just a certified idiot.
by Kôfboay September 27, 2021
Get the Certified idiot mug.
a person who is knowledgeable in things which do not help them in any situation for example algebra. This person does not understand any basic things about the world or has any common sense. they are sometimes fun to be around but make you loose brain cells. they lack basic qualities such as driving, responding, playing spike ball and many more.
I hungout with ellyn last night and she is a certified idiot. She even thought texas was her own country!!
by hahahahahahahhahahahaa June 30, 2020
Get the certified idiot mug.
A certified idiot is a math teacher who doesn’t know that five is less than six.
My math teacher must be a certified idiot; he cannot count to six.
by BbJjDd October 8, 2022
Get the Certified Idiot mug.
A certified idiot is a math teacher who doesn’t know that five is less than six.
My math teachers must be a certified idiot; he doesn’t know that five is less than six.
by BbJjDd October 8, 2022
Get the Certified Idiot mug.
A Maff teacher who doesn’t know the difference between five and six.
My Maff teacher is a certified idiot; he doesn’t know the difference between five and six. What a credited idiot he is.
by BbJjDd October 9, 2022
Get the Certified idiot mug.
A Person that has knowledge in something that is absolutley useless in life
Person 1: Im a certified idiot.

Person 2: Why?

Person 1: i know how to build a weapon but i dont know simple grammar.
by Nuski15 November 11, 2022
Get the Certified Idiot mug.