Abow got its origin from the arabic language and it is being used in Sweden and other European countries since the 80’s ( because of immigration) you say abow when you’re shocked, it basically means like damn or wow
The word „Abow“ is turkish/arabic and is used when something crazy happened or someone told you something crazy / when you‘re shocked
It‘s also used in European countries like Germany and Sweden because the Middle Eastern refugees brought a lot of slang words from their countries to Europe and then the Europeans started using them too.