upset

A disturbance or disruption.

Example: My late arrival caused the professor considerable upset.

An unexpected win.

Example: The Nimrods defeated the Blue Devils yesterday in a stunning upset.

Upset means to be very angry or sad; to be unhappy.

Example: He was upset after someone said bad things to him very loudly.

Something is upset if it is in turned in the wrong direction like something that was dropped; turned in a direction with the bottom part up and the top part down.

Example: When they played with a ball in the room, a cup was upset and all the milk went onto the floor.

If someone upsets a person, they make that person angry, anxious, stressed, or sad; to make a person unhappy.