Buggy Cars

Buggy is generally used to refer to any lightweight automobile with off-road capabilities and sparse bodywork. Most are built either as a kit car or from scratch.

Originally used to describe very lightweight horse-drawn vehicles for one or two persons, the term was extended to lightweight automobiles as they became popular.As automobiles became increasingly sophisticated, the term briefly dropped out of use before being revived to describe more specialised off road vehicles

Refrence: Wikipedia