noun of upset

Except for; With the exclusion of; other than; but

When someone is upset about someone/because they're upset.

(Honestly? No one has defined this yet?) When you feel pain or discomfort in your stomach due to overindulgence or something like that.

When an underdog team is on the verge of taking down the more popular team in any sport.

a person having the state of mind of a fat person and is mad about it

This is when plans are made to do something or a way of doing things has been established, but then some know it all assfuck has to chime in with his/her bright idea. The consequences and repercussions of said assfuck throwing a monkey wrench into the clockworks is what ruins everything that has been running smoothly otherwise. This then causes confusion much like if a applecart would spill out and apples would roll all over the place in a crowded market.