An example of supercilious is a person saying nothing on the menu of a nice restaurant is good enough for them.
The supercilious student couldn't help but to brag about the high score he received on his test.
It is better to be humble and succeed than to be supercilious and fail.
The supercilious lady next door doesn't even smile when we pass in the street.
The supercilious attitude of the opposing team was intimidating.
The supercilious man boasted about his salary, knowing that he was much wealthier than those around him.