What does Ouch mean?
Ouch is defined as a way to express pain. When someone steps on a piece of glass, their exclamation is an example of ouch.
Do British people say ouch?
No. There are different terms and expressions for that in every language, depending on each language’s phonemes. “Ouch” is a uniquely English expression that is attuned to a Germanic language (which is what modern English is).