Bedeutung von “upset” — Learner’s Dictionary

upset

noun [ C ] us uk /ˈʌpset/
SPORT

a situation in which someone beats the player or team that was expected to win:

They caused a major upset by beating the top team 3-1.
a stomach/tummy upset

UK an illness in the stomach

PROBLEM

a difficulty or problem:

We had the usual upsets but overall the day went well.

(Definition von “upset noun” aus dem Cambridge Learner's Dictionary © Cambridge University Press)