The short version: In Chinese internet slang, 666 (read as liù liù liù) means "awesome," "smooth," or "well played." It comes from the word 溜 liù, which means "smooth" or "skilled." When someone pulls off something impressive — a clean headshot in a game, a slick move, a great performance — the chat spams 666. It has nothing to do with the devil; that's purely a Western association.
Where does 666 come from?
The whole thing hinges on one character: 溜 liù — same sound as the number 6 (六 liù). In casual speech, liù means "smooth," "fluent," or "skilled." Say someone's English is really good — a Chinese speaker might say "ta yingyu hen liù" (their English is really smooth/polished).
So when you type three 6s, you're really typing "smooth smooth smooth" — laying it on thick. It started in Chinese gaming and livestream culture around the early 2010s: viewers would spam 666 in the chat when a streamer or player did something slick. From there it bled into everyday texting, comments, and reactions. You'll still see it most in gaming circles, but most people under 40 get the reference.
How to say it
| Chinese | Pinyin | Meaning | |
|---|---|---|---|
| 六六六 | liù liù liù | awesome / smooth / well played (slang) | |
| 溜 | liù | smooth, skilled, fluent (the root word) | |
| 厉害 | lìhai | impressive, awesome (the "proper" way) |
Note the tone: liù is a 4th tone — sharp and falling. So 666 out loud sounds punchy, almost like clapping: "liù! liù! liù!" That energy is part of why it works as a hype reaction.
How to actually use it
Mostly in text. You type 666 in a chat or comments to react to something impressive — like typing "GOAT" or "insane" in English. You can write it alone, or stack it: "6666", "66666" — more 6s, more hype.
Out loud, it's more of an internet thing. In real life, people are more likely to just say 厉害 lìhai ("impressive") or 牛 niú ("badass/awesome"). But among friends who game, dropping a spoken "liù liù liù" with a grin is totally normal.
A quick warning: it's casual slang. Great for friends, games, and internet comments. Don't put it in a work email or say it to your boss — it'd read like ending a professional message with "based 🔥".
Wait — isn't 666 the devil in the West?
Yes — and this is the part that trips English speakers up. In Western culture, 666 is the "number of the beast," associated with Satan and bad luck. In Chinese, it's the exact opposite: a pure compliment with zero dark meaning.
This isn't a translation of the Western 666 — the two meanings evolved completely independently. The Chinese one comes from a sound-alike (liù = smooth), the Western one comes from the Book of Revelation. So when a Chinese friend spams you "666!!!" after you win a game, they are absolutely not calling you the devil. They're hyping you up.
Other number slang you'll see (since we're here)
Chinese internet slang loves number codes — because digits are fast to type and many sound like real words. A few more you'll run into:
| Number | Sounds like | Means | |
|---|---|---|---|
| 520 | wǔ èr líng ≈ wǒ ài nǐ | "I love you" (May 20 is a love holiday) | |
| 1314 | yī sān yī sì ≈ yīshēng yīshì | "forever / for a lifetime" (often paired with 520) | |
| 233 | èr sān sān | laughter / "lol" (from an old forum emoji) | |
| 555 | wǔ wǔ wǔ ≈ crying sound | "waaaah" / crying (sad or joking) | |
| 888 | bā bā bā ≈ 發 | getting rich / prosperity (lucky number) |
Notice the pattern: in Chinese, numbers are constantly doing double duty as words, because the spoken digits sound like other things. Once you start listening for it, you hear it everywhere — and 666 is just the most famous example.
Learn how Chinese numbers actually work →Numbers in Mandarin follow clean, logical rules — master 1-99 and you can count to 10,000. Free interactive tool, tap-to-hear every digit.
FAQ
Is 666 lucky or unlucky in Chinese culture?
It's positive — but for a different reason than you might think. The number 6 (liù) is generally considered lucky because it sounds like 溜 ("smooth, going well"). So 666 reads as "everything goes smoothly." This has no connection to the Western "number of the beast" — the meanings are unrelated.
Why do Chinese gamers type 666?
It started in livestream chats as a hype reaction. When a player does something impressive — a clean play, a clever move — viewers spam 666 (read liù liù liù, "smooth smooth smooth") to say "well played" or "awesome." More 6s (6666, 66666) means more hype.
Can I say 666 out loud, or is it only for texting?
It's mostly written slang. In speech, people more often say 厉害 (lìhai, "impressive") or 牛 (niú, "awesome"). But among friends who game, saying "liù liù liù" with a grin is normal and understood.