If someone is self-confessed, they have said it themselves: they have this quality, and they are not hiding it.

If someone is self-confessed如果一個人是 self-confessed（自稱的） they他們 have said it themselves是自己說出來的 they他們 have this quality有這個特質 and而且 they are not hiding it並不隱瞞

The older, sharper use is for something people look down on — a self-confessed liar, a self-confessed cheat.

The older, sharper use較早、較嚴厲的用法 is for something people look down on是用在大家看不起的事情上 — a self-confessed liar像 a self-confessed liar（自稱的騙子）、 a self-confessed cheat a self-confessed cheat（自稱的騙子/作弊者）

Though actually, writers stretch it all the time, often with a little smile: a self-confessed chocolate lover, a self-confessed nerd, a self-confessed night owl. Those are not crimes.

Though actually不過 writers作家們 stretch it all the time常常把它用得比較寬鬆 often with a little smile常常還帶點微笑 a self-confessed chocolate lover像 a self-confessed chocolate lover（自稱的巧克力愛好者）、 a self-confessed nerd a self-confessed nerd（自稱的書呆子）、 a self-confessed night owl a self-confessed night owl（自稱的夜貓子） those這些 are not crimes都不是什麼罪過

The speaker is saying, “Yes, that’s me. I admit it.” It almost always sits in front of a noun (a self-confessed …).

The speaker說話的人 is saying意思是在說 "Yes, that's me. I admit it."「對，就是我，我承認」 it它 almost always sits in front of a noun幾乎都放在名詞前面（a self-confessed …像 a self-confessed …）

You will meet it in newspapers and chatty profiles more than in playground talk.

You你 will meet it會在 in newspapers and chatty profiles新聞和輕鬆的人物介紹裡遇到它 more than in playground talk多過在校園閒聊裡

It is not the same as confessing to the police.

It它 is not the same as confessing to the police跟向警方認罪不是一回事

And if you call someone a self-confessed expert, it can sound as if you are teasing them, or as if they talked themselves up.

And而且 if you call someone a self-confessed expert如果你說某人是 self-confessed expert（自稱的專家） it它 can sound as if you are teasing them聽起來可能像在調侃他 or as if they talked themselves up或是說他自吹自擂