Harley dentists

From scoot.net

Well-to-do, generaly urban motorcyclists who buy a spanking-new top of the line Harley and $1000 worth of Harley apparel, then go riding once a month and act like they were conceived at a biker rally. Generally unfriendly to scooterists, unlike "real" Harley riders, who are generally more than friendly, understanding the time, effort, and love that goes into restoring and maintaining a vintage scooter.

Also known as "weekend-warriors."