If you are chuffed, you are very pleased — happy with how something went, and a bit proud of it. “I’m chuffed” is British informal speech; Americans almost never say it. British speakers pile it up: chuffed to bits, dead chuffed, well chuffed.

If you are chuffed如果你是 chuffed，you are very pleased表示你非常開心——happy with how something went, and a bit proud of it對事情的結果很滿意，也有點得意。"I'm chuffed" is British informal speech「I'm chuffed」是英式口語；Americans almost never say it美國人幾乎不會這樣說。British speakers pile it up英國人還會加強語氣：chuffed to bits, dead chuffed, well chuffed像 chuffed to bits、dead chuffed、well chuffed 這樣。

It is the sort of thing you say when you passed a test, your team won, or someone liked your cooking — pleased, and not hiding it, but not jumping up and down either.

It is the sort of thing you say這是你會說的那種話 when you passed a test, your team won, or someone liked your cooking像是你考試過了、你的球隊贏了，或有人喜歡你做的菜——pleased, and not hiding it就是很開心，也不藏著，but not jumping up and down either但也不到手舞足蹈的地步。

It comes from a northern English dialect word chuff, which first had to do with looking puffed and well-fed (not a Scottish word). The “very pleased” meaning is not old in print; it turns up in the 1950s.

It comes from a northern English dialect word chuff這個字來自英格蘭北部方言的 chuff，which first had to do with looking puffed and well-fed原本是指看起來鼓鼓的、養得很好的樣子（not a Scottish word不是蘇格蘭字）。The "very pleased" meaning「非常開心」這個意思 is not old in print在文字紀錄裡並不算古老；it turns up in the 1950s是1950年代才出現的。

One messy bit, said kindly: in a few older dialect uses, chuff / chuffed could mean the opposite, a bit sulky. You can forget that for modern English. If a British friend says they are chuffed, they are happy.

One messy bit, said kindly有一點小混亂，先溫和地說一下：in a few older dialect uses在一些比較舊的方言用法裡，chuff / chuffed could mean the opposite, a bit sulkychuff / chuffed 反而可能是相反的意思，有點鬧脾氣。You你 can forget that這點可以忘掉 for modern English對現代英文來說。If a British friend says they are chuffed如果一個英國朋友說自己 chuffed，they are happy意思就是他很開心。