Whacking means very big, and it is informal, spoken, and British. It is used to make a size or an amount sound impressive or shocking: "a whacking great hole in the wall", "a whacking bill", "they made a whacking profit".

Whacking meanswhacking的意思是 very big非常大, and it is informal, spoken, and British是英式口語用法。It is used to make a size or an amount sound impressive or shocking用來讓大小或數量聽起來很驚人: "a whacking great hole in the wall"像'a whacking great hole in the wall'（牆上一個超大的洞）, "a whacking bill"'a whacking bill'（一筆驚人的帳單）, "they made a whacking profit"'they made a whacking profit'（他們賺了一筆嚇死人的利潤）。

You will very often hear it in the pair whacking great, where great does not mean "excellent" but simply adds to the size — "a whacking great dog" is a huge dog. It can also work as an adverb before another describing word: "a whacking big lorry".

You will very often hear it in the pair whacking great你很常會聽到whacking great這個固定搭配, where great does not mean "excellent" but simply adds to the size這裡的great不是「很棒」的意思，只是加強大小 — "a whacking great dog" is a huge dog'a whacking great dog'就是一隻超大的狗。It can also work as an adverb before another describing word它也可以當副詞放在另一個形容詞前面: "a whacking big lorry"'a whacking big lorry'（一台超大的貨車）。

The feeling is friendly and a bit exaggerated, the kind of thing said in conversation or in a newspaper headline, never in an essay or a report; in formal writing you would say enormous, huge, or substantial. It is more common with older British speakers, and Americans mostly do not use it this way.

The feeling is friendly and a bit exaggerated這個字的語氣友善又帶點誇張, the kind of thing said in conversation or in a newspaper headline是那種會出現在對話或報紙標題裡的字, never in an essay or a report不會出現在論文或報告裡; in formal writing you would say enormous, huge, or substantial正式寫作會用enormous、huge，或substantial。It is more common with older British speakers這在年紀較大的英國人之間比較常用, and Americans mostly do not use it this way美國人大多不會這樣用。

Note that whacking is also just the -ing form of the verb whack, meaning to hit something hard — "he was whacking the ball" — so the meaning depends entirely on where the word sits in the sentence.

Note that whacking is also just the -ing form of the verb whack要注意whacking也可以只是動詞whack的-ing形式, meaning to hit something hard意思是用力打某個東西 — "he was whacking the ball"像'he was whacking the ball'（他一直用力打球） — so the meaning depends entirely on where the word sits in the sentence所以意思完全要看這個字在句子裡的位置。