What is a chug and a chuff?

Answer 1

A "chug" generally refers to a sound made by a machine or engine, particularly in reference to the rhythmic noise produced by a train or a vehicle as it accelerates or decelerates. In slang, it can also denote the act of drinking something quickly. A "chuff," on the other hand, is often associated with the sound made by a steam engine or the puffing noise of a train, and it can also refer to a short, sharp exhalation, sometimes used in the context of laughter or derision. Both terms evoke a sense of movement or sound related to machinery or exertion.