There are 2 definitions of chuff in English:

chuff1

Line breaks: chuff
Pronunciation: /tʃʌf
 
/

verb

[no object, with adverbial of direction]
(Of a steam engine) move with a regular sharp puffing sound: the train was chuffing out of the station
More example sentences
  • Installed around 18 months ago at a cost just a tad short of £500,000, the Fort William turntable was intended to be a novel tourist attraction to augment the steam train service that chuffs along the line during the summer months.
  • I felt as though I were a train that was slowly chuffing off from the station, the wheel spokes moving in slow, forward motions.
  • With all but the very last of the swimmers in, some of the boats began to chuff into harbour as well, the pilots waving to their friends.

Origin

early 20th century: imitative.

Definition of chuff in:

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Word of the day impudicity
Pronunciation: ˌɪmpjʊˈdɪsɪti
noun
lack of modesty

There are 2 definitions of chuff in English:

chuff2

Line breaks: chuff
Pronunciation: /tʃʌf
 
/

noun

British informal
A person’s buttocks or anus.
More example sentences
  • If Smith is such a great constituency Member of Parliament, why did he not get off his chuff and write to the Minister about the issues of which he speaks?
  • And so, to have at least one part of me moving while I chat and listen to him, I've played Zuma to make me feel like I'm achieving something besides sitting on my chuff.
  • On this makeshift stage women showed you their chuffs for a quid.

Origin

1940s: origin uncertain.

Definition of chuff in:

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Word of the day impudicity
Pronunciation: ˌɪmpjʊˈdɪsɪti
noun
lack of modesty