1. To lack common sense, brain cells or
knowledge of the simple things an individual should know.
2. The act of not knowing
something.
3. Behaving immaturely or
childish.
4. Lack of careness towards things.
e.g. Jack lacks brain cells, he is a stupido.
e.g.
Eddy is a stupido because he doesn't know what stupido means.
e.g. Like a stupido, Jack is knocking his
head with a
hammer.
e.g. Eddy doesn't care that the house he built has broken down.