Not cool — but you have to know what 'cool' means first. 'Cool' is a word of praise for a person, a thing, or a way of acting: relaxed, confident, stylish, the kind of thing that makes people want to be near you. 'Uncool' is the opposite of that, and it is a judgement, not a fact.

Not cool不酷 but you have to know what 'cool' means first但你得先知道 cool 是什麼意思。'Cool' is a word of praise for a person, a thing, or a way of acting「cool」是用來稱讚一個人、一件東西，或一種做事方式的字 relaxed, confident, stylish輕鬆自在、有自信、有型 the kind of thing that makes people want to be near you是那種會讓人想靠近你的特質。'Uncool' is the opposite of that「uncool」就是它的反面 and it is a judgement, not a fact而且它是一種評判，不是一個事實。

It says: this is embarrassing, this is not what people like us do. Two ways it gets used. About things: uncool clothes, an uncool phone, an uncool band — out of fashion, the sort of thing people quietly laugh at.

It says它在說的是 this is embarrassing這樣很丟臉 this is not what people like us do這不是我們這種人會做的事。Two ways it gets used這個字有兩種用法。About things用在東西上時 uncool clothes, an uncool phone, an uncool band像 uncool clothes（俗氣的衣服）、an uncool phone（過時的手機）、an uncool band（俗的樂團） out of fashion就是退流行 the sort of thing people quietly laugh at是大家會偷偷笑的那種東西。

About behaviour: 'That was really uncool.' Here it does not mean unfashionable at all — it means you acted badly, you were unkind or unfair, you broke the unwritten rule. A friend tells everyone your secret; that is uncool.

About behaviour用在行為上時 'That was really uncool.'「That was really uncool（你這樣真的很不夠意思）」 Here it does not mean unfashionable at all這裡完全不是在講退流行 it means you acted badly意思是你做得不對 you were unkind or unfair你不厚道或不公平 you broke the unwritten rule你破壞了大家心照不宣的規矩。A friend tells everyone your secret朋友把你的祕密講給大家聽 that is uncool那就是 uncool。

Notice that this second use is a soft way of saying something hard. It sounds gentle, but the person is genuinely upset with you. The word is informal.

Notice that this second use is a soft way of saying something hard注意這第二種用法，是用溫和的方式在講一件很重的事。It sounds gentle聽起來很溫和 but the person is genuinely upset with you但對方是真的對你不高興。The word is informal這是個口語用字。

It belongs to young people, and it belongs to a certain time — it was strongest from the 1960s to the 1990s, and today it can sound slightly like your parents trying to sound young. Teenagers now more often say 'cringe' or 'that's not it'. Also, the newest slang keeps changing what counts as cool, so 'uncool' quietly means 'uncool to my group' — one group's uncool is another group's normal.

It belongs to young people它是年輕人的字 and it belongs to a certain time也是屬於某個時代的字 it was strongest from the 1960s to the 1990s從1960到1990年代最流行 and today it can sound slightly like your parents trying to sound young現在聽起來則有點像爸媽在裝年輕。Teenagers now more often say 'cringe' or 'that's not it'現在的青少年比較常說「cringe」或「that's not it」。Also, the newest slang keeps changing what counts as cool而且最新的流行語一直在改變什麼算 cool so 'uncool' quietly means 'uncool to my group'所以「uncool」其實悄悄地意味著「對我這個圈子來說不酷」 one group's uncool is another group's normal一個圈子覺得 uncool 的，在另一個圈子可能很正常。

A last thing: there is a rare, older use where 'uncool' means not calm, agitated, someone who has lost their cool. You will meet it in old books and songs, not in daily talk.

A last thing最後一件事 there is a rare, older use where 'uncool' means not calm, agitated有一種罕見的舊用法，指不冷靜、心浮氣躁 someone who has lost their cool一個「失去冷靜」的人。You will meet it in old books and songs你會在舊書和舊歌裡遇到這個用法 not in daily talk而不是在日常對話裡。