So, you want to speak more like the locals, do you? Today, we’re going to make you cool by exploring the 속어 word 「やばい」(yabai) and showing you its myriad of usages. Let’s get crackin’!

필수 일본어 속어 スラング that everyone should know! | 일본어를 배우다 온라인

Yabai!(やばい): A Common Japanese Phrase to Show How Cool You Are

Looking 「やばい」up in the dictionary will produce a number of results. 

Risky, dangerous, amazing, cool, insane, crazy, extreme…

Where did this word come from, and how did it take on so many different meanings?

The Origin of 야 바이

야 바이 is an 형용사 that comes from the root 동사 危ぶむ (ayabumu). If we take a closer look at the 한자 for 危ぶむ, we see that it is made up of three different radicals. 

勹  + 卩  +  厂  =  危

勹 (hou) is the radical for wrapping,卩 (세츠) is the radical for seal, and  厂 () is the radical for trailing cliff. Put them together, and you get the 한자 危 (), which means “dangerous.” This 한자 then acts as an anchor to the word 危ぶむ, which means “to be afraid of…,” “to have misgivings about….,” “to be apprehensive of…,” “to fear,” etc. 

It is believed that the word “yabai” has been in use since the Edo period. It was originally used as a code word among thieves and criminals to indicate that an act was too risky to pursue.


The Modern Use of 야 바이

In the United States about 30 years ago (give or take a decade), all of a sudden everything that was “good” was now “bad.”

“Wow, man, is that your new car? That’s so bad!”

Of course, the person saying this didn’t mean “bad” literally. They were using “bad” as a 속어 term to mean “wonderful; deeply satisfying; stunningly attractive or stylish; sexy” (Random House Historical Dictionary of American 속어).

The same happened for the word “yabai” in Japanese. It still retains its literal meaning from the Edo period (“dangerous” or “risky”), but it has evolved to the point where it can also be used as a 속어 term to mean the opposite. In this sense, it has a closer resemblance to 凄い (sugoi, great). To show you how this works, let me first show you how “yabai” is used in its literal sense:  

Shouboushi wa yabai shigoto desu.
A firefighter is a dangerous job.
Yabai, shuuden!
Omg! My last train!
Yabai! Kagi wo kuruma no naka ni tojikomechatta.
Shit! I locked my keys in the car!
Yabai! Kyou shiken ga aru no wo wasurechatta!
Son of a b@#$%! I forgot there was an exam today!

However, at some point in time—like with our example of “bad”—the Japanese youth all got together and decided, “Let’s use this word to mean the opposite of what it says in the dictionary!” Therefore, as a modern 속어 term, it takes on the meaning of “amazing; cool; insane; crazy; extreme.” Here is an example:

Are wa anata no kuruma? Yabai ne!
Is that your car? Yowza!

People also pronounce “yabai" in a few different ways according to preference in order to underscore that they’re using casual speech. Here are a few different ways to pronounce it:


Yaba! (The small つ means that the final “a” sound is clipped short)




Yabe! (The final “e” sound is clipped)

Kaori-chan, kyou meiku yaba!
Kaori, your make-up today is like wooooow!
Herikoputaa de gakkou e iku no, yabee naa!
Going to school by helicopter is like wooooow!
Kono raamen oishii yo ne! Yabe!
This ramen is God in my mouth! Like woooow!

"야 바이” is also commonly used in its negative form as a rhetorical question.

Kono eiga eroi. Yabakunai?
This movie is so sexual. Should we really be watching this?
Watashi wa onna no ko. Anata wa otoko no ko. Onaji heya ni tomaru no, yabakunai?
I’m a girl. You’re a guy. Isn’t staying in the same room a little…you know…?

"야 바이” can also be used in conjunction with other adjectives동사 to indicate emphasis. Since “yabai” is used as a 속어 word in these instances, it does not follow conventional grammatical rules. 

Kono geinojin wa yabai omoshiroi!
This performer is f@%$#&* funny!

(Notice that we don’t say the grammatically correct やばく面白い [yabaku omoshiroi] because it doesn’t sound natural. This is because when people are using 속어, they don’t tend to stop and make sure they’re obeying grammatical rules.)

Kyou yabai nemui!
I’m sooooooooo sleepy today!
Anata wa yabai jidori totteru ne!
You take a f@#$ ton of selfies, don’t you!

In Conclusion

"야 바이” Is a common word used in Japanese. Its dictionary meaning is “dangerous” or “risky.” However, it can also be used as a 속어 term to mean “amazing; cool; insane; crazy; extreme…” It can also be used together with adjectives동사 for emphasis, like “so” in “so funny” and “so cool.” “야 바이,” when used as 속어, does not need to abide by grammatical rules.

Now that you’ve learned a new common phrase, it’s time to get out there and 연습! Tell your speaking partner how awesome or cool something is by using the word “yabai.” You should also try using it in its literal sense to ensure that you completely understand its meaning in all contexts.

생각해 내다, 연습 완벽 해져서 거기서 나가 연습, 연습, 연습


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