When one person feels that their own personal value and importance is greater than it actually is.
Marie and Andrea are making buttons for a fundraiser.
Marie holds the button maker.
Andrea says smugly, "Oh please. Let me make that."
Marie makes a button, but she mistakenly does a wrong step and it comes out less than perfect.
Andrea makes a invidious face. "I told you I should have made that."
Now, class, is this an example of superiority complex?