—n. 1. the sound made by a small internal-combustion engine or imitative of its operation.
2. Informal.a small internal-combustion engine, or something, as a boat or model airplane, equipped with one: the sound of distant put-puts on the lake.
—v.i. Informal.to operate with sounds suggesting a put-put, as a small motor or motor-driven device. Also,putt-putt.