2. A sport (bicycle motocross) which evolved from motocross racing (aka: dirt biking) which involves racing on a dirt track with berms and jumps on a bicycle. Two major sacntioning bodies exist today. The ABA (American Bicycle Association) and the NBL (National Bicycle League).
3. Usually a 20" (can be 24") wheeled bicycle designed to ride on dirt trails, jumps, street obstacles, or skateparks. Not a kids bike or dirt bike.
All you people saying "BMX rules, I kick the fuck out of skaters" need to get your middle class heads out of your arse and get a clue. Silly pricks. BMX and skaters should get along, its all better than doing smack and stealing cars and respect to anyone who rides, skates or blades for that reason. I would not call it a sport either, no rules, no teams...get a clue you wankers.
Ohhh, and take your brakes off, give it a go and if you dont like it put 'em back on.
And even though I skate, I didnt bag out bmxing. Its a shame it doesnt work the other way around.
Bmxer Guy: "Uh, skating sucks!"
Skater Guy doesnt even bother bagging out bmxing and gets back to his Heelflip tailslides on the grindbox.