He looked around at the packed, distressed cement floors and frontier-style wooden booths as we chugged our last drink.
As they chugged toward the aid station, they passed by the bodies of the two dead insurgents Larson had killed.
1866, echoic of a working steam engine. As a verb, from 1884. Related: Chugged; chugging. Drinking sense attested by 1940s (chug-a-lug), probably imitative of the sound of swallowing.
To drink very quickly and in volume, as alcohol: chugged six milks at lunch
To move along, esp slowly and laboriously: The USS Saratoga came chugging up the Delaware
[1900+; echoic of an engine, esp a steam engine, operating]