have a blog.  I'm good at debating on here.  However, if you knew me in real life you'd know I'm "stupid" at debating in real life.  So this definition can be spurious. Try this definition according to Dictionary.com:  Mental dullness; senseless; foolish; like a "stupid" question or "stupid" comment.  This can be spurious as well, because nervousness can make someone say something stupid.  For example, the person who rushes through an intersection and nearly hits you while you're waiting to let a pedestrian cross the road is not stupid so much as a nervous response.  So we must be careful here. How about this definition:  Annoying or irritating; troublesome.  Yes, this one might work.  Yet this could be spurious as well.  So I think a real definition of stupid is merely speculative. So how do you deal with truly stupid people?  How do you deal with stupidity? Turn the other cheek Smile Walk away Yes, I know that sounds too simple, but I am of the belief that if someone you perceive as stupid gets you upset in any way, that makes YOU the stupid person.  So you are best to follow my advice here.