The story
- Chinese · calque of加油
- English todayadd oil
Calque of Chinese 加油 (jiāyóu), particularly in Hong Kong contexts via its Cantonese pronunciation gaa1 jau4-2, sometimes credited to shouts of support during the Macau Grand Prix. Compare cooking with gas, gas up, fuel up, etc.
Etymology from Wiktionary, CC BY-SA 4.0.