This stands for Bicycle motocross. This was derived from motorcycle motocross and is off-road racing over a track that has been laid out with various obstacles on it. BMX bicycles are like mountain ...
A ploy where one rider rides just behind and to one side of another rider, who is usually a team mate, so a third rider can not pass without having to swing wide around them.
A maneuver on a mountain bike that involves locking up the rear brake, which forces the rear end to skid or slide sideways making a sharp turn. Works best on dirt.