Definitions

1. verb

to drink (especially a large quantity) of a beverage, especially beer, at one time

“He went to the bar and began to chug a cold beer.”

2. verb

to move or go with a steady, rhythmic, or jerky motion

“The old train chugged along the tracks.”

3. verb

to make a loud, harsh, or jerky sound

“The old engine chugged loudly as it started.”

4. noun

a heavy, steady, or jerky movement or sound

“The chug of the engine was very loud.”