Big name in stunt bikes

• Stunt biker's bike, briefly
• Extreme sport, for short
• Stunt rider's sport
• Wee racing bicycle
• X-Games bike, briefly
• Cycle sport
• Trick bike

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
1978, semi-acronym from bicycle motocross .

Wikipedia Word definitions in Wikipedia
BMX may refer to: Bicycle motocross , a sport of racing on bicycles on motocross style tracks BMX bike , a bicycle used for casual use and sport, and designed mainly for dirt and motocross cycling Big Mountain Air Force Station (IATA: BMX), a military use ...