Opa (expression) - Wikipedia
https://en.m.wikipedia.org/wiki/Opa_(expression)
Opa (Greek: ώπα) is a common Mediterranean, Eastern European, Middle Eastern, North African, South American, and Jewish emotional expression. It is frequently used during celebrations such as weddings or traditional dancing. In Greek culture, the expression sometimes accompanies the act of plate smashing. It can also be used to express enthusiasm, shock or surprise, or just after having made a mistake.
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