BMX(redirected from BMX rider)
1. A bicycle race on a dirt track with steep hills and sharp curves.
2. A bicycle with a stout frame, knobby tires, and usually 20-inch wheels, used for racing on such a track and for performing tricks.
[Abbreviation and respelling of bicycle motocross using the letter X to represent the word cross.]
1. bicycle motocross; stunt riding on rough ground or over an obstacle course on a bicycle
2. a bicycle designed for bicycle motocross