The story
- Cantonese · derived from白牌車 /白牌车
- English todaypak pai
From Cantonese 白牌車 /白牌车 (baak⁶ paai⁴⁻² ce¹), literally ‘white numberplate’.
First known use, by meaning
- from 20th c. A car used as an illegal taxi in Hong Kong.
Etymology from Wiktionary, CC BY-SA 4.0.