A person that rides motocross (i.e dirt bikes and/or atvs) , who buys the most expensive gear, bike, and equipment but is terrible at the sport. They think they are good but have no style and look like they are a rag doll on the bike. When they accelerate it whips them back in a violent motion and they take out lines and berms on the track. They also land short on jumps also known as "casing". They have no sense of what they are doing.
"Hey Tanner, want to go to Throttle 215?" Said Chase.
"Yeah. Lets hope there are no goon-riders there." Said Tanner
"Hey Chase, isn't that your buddy Alex over there? He has the new 2012 Honda." Said Tanner
"Yeah, but he is a goon-rider." Said Chase.
"Oh man! You're right! ha What a goon." Said Tanner.