Learn Top 15 Bad Japanese Words, Curses & Insults

learn japanese

Hi there!

You want to learn Japanese curses and BAD Japanese words, huh? Here’s what I say to you: WELCOME! Why am I so happy you’re learning bad Japanese words?

Every learner starts with bad words. FACT. In my journeys to learn Spanish, Japanese, Korean, German, Russian… I started with… the BAD words! They’re fun. So take this lesson and…

  • Read, review, and read out loud – YELL these words!
  • Print it out as physical review material (I like printing stuff)
  • Save images for your personal use (as flashcards)
  • NONE of these are nice language. Proceed at your own discretion.
  • Again, I Warn You: This post contains bad words. Last chance to leave.

And if you REALLY want to learn Japanese with complete learning program – 2,000+ audio/video courses, lessons by Japanese teachers, apps, study tools – Sign up at JapanesePod101 (click here) and start learning! I recommend ’em as a teacher & learner.

Top 15 Bad Japanese Words, Curses & Insults

1. Damn, Crap, F**k, Sh*t

  • くそ
  • Kuso

Kuso is quite versatile. You can use it when you drop a plate. When you hit your funny bone. When coffee spills on your white shirt. The list goes on. Literally, it means shit but it can be used and interpreted as any of the word above. One of my favorite bad Japanese words by far.

bad japanese words

2. Uzai

  • うざい
  • Annoying, (pain in the ass)

Uzai literally means annoying or noisy in Japanese. Is someone annoying you? Or do you want to call someone annoying? This is the word for you. Now, if you want to apply some slang to it, you can turn uzai to uzeee to emphasize just how annoying they are. The longer the “e,” the more the emphasis.

bad japanese words

  • Isn’t Bob a pain? He is, isn’t he?
    • ボッブってうざくねぇ?うぜーよね。
    • Bobbu tte uzakunee? Uzee yo ne.
      • (deal with it, Bob)

Note: You can also use “uzai” as “shut up.

bad japanese words

3. Fart in Japanese

  • おなら
  • Onara

This is not truly one of the bad Japanese words. But, it’s good to know. Why? Sometime soon, you or perhaps someone you know and love will fart. When they do, will you be able to talk about it in Japanese? If you call yourself a true-blue Japanese learner, then you better be able to.

bad japanese words

Now, here are some bonus fart phrases.

  • Kusai Onara
    • 臭いおなら
    • Stinky fart
  • Onara wo suru
    • おならをする
    • To fart
  • Kare ga shita onara wa kusai.

    • かれがしたおならは臭い。
    • His fart smelled.

bad japanese words

4. Son of a B/Damn it/Sh*t/For Christ’s sake

  • 畜生 (ちくしょう)
  • Chikushou

Chikushou means despicable person literally. But, the everyday use is quite different. When used as a sudden interjection, it’s a lot like kuso! So, you can use it in the same way as “damn” or “crap.”

bad japanese words

For example….

  • Sh*t! I’ve got a flat tire.
    • ちくしょう、パンクだ。
    • Chikushou, panku da.

5. I need to poop.

  • Unko shitai
  • うんこしたい。

You learned about farts in Japanese, right? It’s only fair that you learn that unko means poop. That’s right, unko is the nice word for what comes out, just like poop is in English. Please refer to kuso for more vulgarity.

bad japanese words

6. I’ve got diarrhea.

  • ゲリしてる。
  • Geri shiteru.

Another wonderful Japanese phrase to know. And yes, geri means diarrhea. So, if your name is Gary, please be aware of what your name sounds like in Japanese.

bad japanese words

7. Stupid

  • ばか
  • Baka

Baka is a super common Japanese word. If you use it on a person, you can use it to say stupid, fool or idiot.

bad japanese words

  • I have a stupid question.
    • バカな質問しつもんがあるんだ。
    • Baka na shitsumon ga arunda.
  • Don’t be stupid.
    • バカ言いうな
    • Baka iuna.

bad japanese words

8. Idiot/Asshole

  • ばかやろう
  • Bakayarou

What’s bakayarou in English? This is a level up from baka. They’re not just stupid, but a total, grade-A idiot. You can even go as far as calling them an asshole!

bad japanese words

Here are some examples:

  • If you do it tomorrow, you’re an idiot
    • 明日やろうは馬鹿野郎
    • Ashita yarou wa bakayarou
    • This comes out as a nice, poetic saying because “ashita yarou” and “bakayarou” rhyme.

bad japanese words

  • Who’s the asshole who dares call me in the middle of the night?!
    • どこのばかやろうがこんな真夜中に電話でしてきやがるんだ。
    • Doko no bakayarou ga konna mayonaka ni denwa shitekiyagarunda.

9. Stupid/Unaware/Clueless

  • ぼけ
  • Boke

Boke in Japanese has some various uses, just like some other bad Japanese words you learned above.

bad japanese words

10. Moron/Idiot

  • あほ
  • Aho

Well, the Japanese language definitely has a lot of ways to call someone stupid. Aho is one of them.

bad japanese words

  • Are you stupid?
    • あほか
    • Aho ka?

11. Guy

  • Yatsu

Japanese has a lot of nuance inside. Yatsu means just “guy” but it carries a lot of negative air. So, while you’re not insulting them, you’re putting them down levels below you by referring to them as that. This sounds a bit vague but try to remember it like that.

12. Don’t mess with me/ F*** Off.

  • ふざけるな
  • fuzakeru na

Fuzakeru means to joke or fool around. The na is used to negate the word. When used aggressively, this used to warn other people or tell them to buzz off.

bad japanese words

13. Die!

  • 死ねえ
  • Shinee

Oh, you know; for when you want to tell someone to kick the bucket.

bad japanese words

14. Eat Sh*t

  • くそくらえ
  • kuso kurae

The good news is that you already know what kuso means in Japanese. Now, let’s add one more word and tell people to eat.

bad japanese words

15. Fatty.

  • でぶ
  • Debu

And let’s end it on a nice insult.

bad japanese words

That’s it for part 1. Whew.

Yes, there’s tons more bad Japanese words, curses and phrases.

Other lessons you will absolutely love:

The Main Junkie

P.S. I highly recommend this for Japanese learners. If you REALLY want to learn  Japanese with effective lessons by real teachers – Sign up for free at JapanesePod101 (click here) and start learning!

learn japanese