BMX
noun/ˌbiː em ˈeks/
/ˌbiː em ˈeks/
- [countable] a strong bicycle which can be used for riding on rough ground
小轮车；越野自行车 - (also BMXing)[uncountable] the sport of racing BMX bicycles on rough ground
小轮车越野赛
Word Origin1970s: from the initial letters of bicycle motocross, with X standing for cross.