Informal. When something is full-on, it is as strong, loud, busy, or complete as it can be — nothing held back.

Informal口語用法。When something is full-on當某件事是 full-on 的時候，it is as strong, loud, busy, or complete as it can be它就是能有多強、多吵、多忙、多完整就有多強、多吵、多忙、多完整—— nothing held back完全不保留。

A full-on party is wild, not a quiet cup of tea; a full-on argument is a real fight; full-on summer heat means the hottest kind. You can also use it like an adverb: they went full-on with the decorations; she is full-on in exam week.

A full-on partyA full-on party（很嗨的派對） is wild很瘋狂，not a quiet cup of tea不是安安靜靜喝杯茶那種；a full-on argumentA full-on argument（真正的爭吵） is a real fight是真的吵起來；full-on summer heatfull-on summer heat（盛夏的酷熱） means the hottest kind指的是最熱的那種。You can also use it like an adverb你也可以把它當副詞用：they went full-on with the decorations他們裝飾弄得非常徹底；she is full-on in exam week她考試週整個人火力全開。

Younger speakers use it a lot, and it is especially at home in British and Australian English, though Americans say it too now. It belongs in chat, messages, and casual stories, not in a formal report.

Younger speakers use it a lot年輕人很常用，and it is especially at home in British and Australian English尤其在英式和澳式英語裡很自然，though Americans say it too now不過現在美國人也會這樣說。It belongs in chat, messages, and casual stories它適合出現在聊天、訊息和輕鬆的小故事裡，not in a formal report不適合正式報告。

People stretch it: “full-on mode” just means they are not holding anything back. Though actually, it does not mean a machine is switched fully on; it means extreme.

People stretch it人們也會延伸這個詞的用法："full-on mode""full-on mode"（全力模式） just means they are not holding anything back意思就是完全不保留。Though actually不過其實，it does not mean a machine is switched fully on它不是指機器完全開啟；it means extreme它的意思是"極致"。