外國朋友問：What does 'add oil' mean in Hong Kong?

'Add oil' (加油) is a Hong Kong English expression meaning 'go for it' or 'keep going', used to encourage someone. It originated from Cantonese 'ga yau' and was officially added to the Oxford English Dictionary in 2018. In Hong Kong, you'll hear it at sports events, exams, or workplaces. For example, before a marathon, friends might shout 'Add oil!' to cheer you on. It's a positive, energetic phrase that reflects Hong Kong's unique bilingual culture. You can use it in both casual and semi-formal settings.