To be '''dumb''' is to have a substantially inferior thinking ability as compared to the regular norm. It is not a recognized medical term, but is a part of everyday speech. There are also temporary choices or decisions that are made that are unwise that could be called dumb even if the person making them generally does not suffer from a diminished thinking ability. | To be '''dumb''' is to have a substantially inferior thinking ability as compared to the regular norm. It is not a recognized medical term, but is a part of everyday speech. There are also temporary choices or decisions that are made that are unwise that could be called dumb even if the person making them generally does not suffer from a diminished thinking ability. |