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| Date: | 1800-1900 |
| Origin: | From the sound |
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chug
past tense and past participle chugged, present participle chugging
past tense and past participle chugged, present participle chugging1
[intransitive always + adverb/preposition] if a car, train etc chugs somewhere, it moves there slowly, with the engine making a repeated low sound
[intransitive always + adverb/preposition]2 [transitive] also chug-a-lug American English informal to drink all of something in a glass or bottle without stopping
3 [intransitive always + adverb/preposition] to make slow but steady progress : 
The economy just keeps chugging along.
The economy just keeps chugging along. —chug noun [countable usually singular]
