Biker

Biker: noun; Someone who rides a motorcycle, typically with short exhaust pipes so that they will be noticed by everyone within earshot because they are extremely insecure. This insecurity is typically further indicated by the need to travel in large groups, where everyone wears identical clothing, and mask their insecurities by attempting to bully and intimidate otherwise decent people.

"Did you hear that excessively loud motorcycle go by? I feel so sorry for that poor Biker."