What is another word for put-put?
Pronunciation: [pˌʊtpˈʊt] (IPA) 
"Put-put" is often used to describe a sound made by a small engine or motor, typically relating to a boat or car. Synonyms for this onomatopoeic term include "chug-chug," "vroom-vroom," "rumble," "buzz," and "hum." These words are all used to indicate the sound of an engine or motor running, although some may be more commonly associated with specific types of machines. For example, "vroom-vroom" is often used to describe the sound of a car's engine accelerating, whereas "chug-chug" is more commonly associated with the sound of a boat's motor. No matter which synonym is used, these terms all evoke the same sense of a machine powering up and moving forward.
