Why Do Koreans Say Fighting?

Ever wonder why Koreans say "fighting"? If you watch Korean tv shows or movies, you've likely heard it more than once. It's obvious what they mean by why do this say it?

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Do Koreans really say 'fighting' as shown in Korean dramas? - Quora

Why South Koreans Say 'Hwighting!

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Do Koreans really say 'fighting' as shown in Korean dramas? - Quora