Merriam-Webster's Collegiate® Dictionary, 11th Edition
BUGGY
I. adjective (buggier; -est)
Date: 1714
infested with bugs , characterized by bugs,
II. noun (plural buggies)
Etymology: origin unknown
Date: 1770
a light one-horse carriage made with two wheels in England and with four wheels in the United States, a small cart or truck for short transportations of heavy materials, baby carriage