tell the principal
Depends what you mean by an enemy. If you were a small deer or a rabbit, yes I suppose it would be. If you are a person, then probably not - unless you really upset it
I had an upset stomach. He upset me greatly.
They gey upset because you did something to make them angry.
Get Along With You Enemy Or Kill Your Enemy Or Make Him/Her Disappear
Yes, "upset" is a predicate nominative in this sentence. It renames the subject "Sidney" after the linking verb "make." In this context, it indicates that Sidney is in a state of being upset as a result of the teasing.
Frenemy=friend+enemy. If you make an enemy, they are not your frenemy. If you make a friend, they are not your frenemy, either.
Sometimes it's to try and "turn the tides" in a fight and make you feel bad. It could also be because when your upset you may say or do things that make them upset.
be mean and upset them
yes
to upset the cake means to make it sad, ie floppy and saggy, deflated etc
Peanut butter is not recommended for upset stomachs.
Who would want James upset? Maybe..if you still his hat[he loves his hat].