When you experience a sense of disappointment then you feel let down, and you expected something better than what happened or what was received. If you are expecting a new car and you end up with a junker then you may feel disappointed. Parents who expect great things from children may experience disappointment if their children do not live up to their expectations, such as flunking out of college or being arrested.
Don't blame people for disappointing you. Blame yourself for expecting too much.
The disappointment of manhood succeeds the delusion of youth
I'm disappointed, but I'm not going to run around like Dennis Rodman and head-butt somebody
Opportunity is a favorable occasion for grasping a disappointment