1. An expensive custom motorcycle put together by a motorcycle shop, usually purchased by a wealthy individual. 2. A custom motorcycle built with bolt-on parts right out of boxes, with no custom fabrication.
1. Greg didn't want to get his fingers dirty buildin' his own bike, so he bought an over-the-counter chopper. 2. Big Doug ordered all the parts he needed out of the catalog to put together his over-the-counter chopper.