Buggy
WordNet
adjective
(1) Infested with bugs
(2) Informal or slang terms for mentally irregular
"It used to drive my husband balmy"
noun
(3) A small lightweight carriage; drawn by a single horse
WiktionaryText
Noun
- A small horse-drawn cart.
- A small motor vehicle, such as a dune buggy.
- A shopping cart (predominantly in the southern US) or trolley.