What does 아자스 (ajaseu) mean? Not a cheer — it's “thanks” from Japanese

Our editor bought a younger colleague a coffee. Taking the cup, the colleague said, “아자스!” Our editor reflexively made a fist: “Yeah! 아자아자 fighting!” The colleague paused, then laughed. It wasn't a cheer. It was “thank you.” The next day, a news story showed our editor wasn't the only one.

In May 2026, Kyeonggi Ilbo told of a teacher who heard students say 아자스 and assumed it was the cheer 아자아자 파이팅 (“you can do it!”). In October, Munhwa Ilbo used 아자스 as an example of slang that splits generations. On Google, it's searched alongside “meaning” and “origin.” Here's how one word for “thanks” came to need so much explaining.

The original is a polite “thank you very much.” Squeeze it into three syllables and the politeness drains out, leaving something like “thx.” Kyeonggi Ilbo describes 아자스 as a word “used when you're grateful or thankful,” and Munhwa Ilbo as “a shortening of arigatō gozaimasu, which means thank you.” The usage is simple: someone shares a snack, shows you their homework, likes your post. The only twist is that, depending on the listener's age, it can turn into a cheer.

• 젤리 하나만… 오 아자스!Can I have one gummy… oh, 아자스!Break time, at a friend's desk
• 필기 사진 보내 줘서 아자스ㅠㅠ 너 아니었으면 망함아자스 for sending your notes 😭 I'd be doomed without you.KakaoTalk, the night before an exam
• 생일 축하 메시지 다들 아자스~ 하나하나 다 읽었어요아자스 for all the birthday messages~ I read every one.Instagram story
• 아자스! 다음엔 내가 쏠게아자스! Next one's on me.At a convenience-store counter, between co-workers who started together
• 아자스? 그래, 아자아자 파이팅!아자스? Yeah, you can do it!A teacher (who thought it was a cheer)

아자스 isn't a Korean coinage. In Japan, people also shorten the phrase to あざす (azasu) or あざーす (azaasu). The learning site Self Taught Japanese describes it as a shortening of the polite thank-you that means about the same as ありがとう but sounds rough — like a guy on a school sports team — and advises against using it with seniors or teachers even in Japan.

In Korea it settled into the spelling 아자스. Plenty of explanations say it came via Japanese anime, variety shows or online comments, but they disagree on which work or show set it off. What's clear is that in 2026 the Korean press began treating it as everyday teen speech.

One: sometimes “thank you” is awkward. 고마워 can feel earnest and 감사합니다 stiff. Running it through a foreign language takes the weight off. Just as Koreans borrowed “thank you” from English, 아자스 is gratitude you can toss off lightly.

Two: Japanese shortenings arrived as a set. Asia Today's 2026 mid-year roundup filed 아자스 under “expressions used every day,” in the same box as 멘고멘고, a flipped version of the Japanese “gomen” (sorry), and the gyaru-style greeting “~야호.” Thanks, sorry and hello can now all be said in clipped Japanese.

Three: it's short and bright. Three syllables trailing off on “-스” sound like an exclamation. Put it next to 야르 (a cheer of joy) and 샤갈 (a grumble of annoyance), and most of a Korean teen's emotional range fits in three syllables.

The order in which 아자스 hit the news shows a shift in tone. Kyeonggi Ilbo's May 2026 headline was “Thanks? 아자스. Ugly? 밤티?” — a light piece on a “golden age of slang,” with the teacher who couldn't make out what the students were saying. In it, culture critic Kim Heon-sik said that with slang, “whether it survives matters more than how it's made,” and that worries about a generational communication breakdown shouldn't be overblown.

In July, Asia Today presented 아자스 as a handy everyday expression. Then on October 8, Munhwa Ilbo ran the headline “늙크크, 밤티, 아자스… slang that cuts off generations is everywhere.” In five months, the same word went from “fun new slang” to “a word that divides generations.” In that article, Yu Sung-ho, a Korean literature professor at Hanyang University, said young people build identity through new slang, but “older generations may feel resistance to unfamiliar, alien language.” We found no figures on how often it's used or searched, so we don't chart any.

So 아자스 is the lightest way to say thank you. Since then, whenever our editor buys a younger colleague coffee, they say first: “You can say 아자스.” The cheering, they'll do separately. If you have a sharper definition, add it to the 아자스 entry in the dictionary.