What is a thumper?

A thumper is a colloquial term used to describe a person who is overly enthusiastic, energetic, and loud. They may be seen as aggressive, obnoxious, or attention-seeking in their behavior. The term can also refer to a type of motorcycle engine that has a single cylinder with a large stroke, resulting in a distinctive pounding sound when running. Thumpers are known for their simplicity and reliability, making them a popular choice for off-road and dual-sport motorcycles.