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空気読む くうきよむ
To read the room — sensing the unspoken mood and acting accordingly.
Casual
2
KY けーわい
Stands for 'Kuuki ga Yomenai' — someone who can't read the room.
Casual
3
マジ まじ
"Seriously" / "for real" — the go-to intensifier in everyday Japanese
Casual
4
めっちゃ めっちゃ
The go-to intensifier meaning "very" or "super" — originally Kansai dialect, now used everywhere in Japan
Casual
5
港区女子 みなとくじょし
Women who party in Tokyo's flashiest district — glamorous but loaded with judgment
Casual
6
港区 みなとく
Tokyo's richest ward — used as slang for wealth, status, and a certain lifestyle
Neutral
7
マウント まうんと
Flexing your superiority — the act of one-upping someone to establish dominance. Used in 'マウントを取る' (to take the mount / to flex on someone).
Casual
8
無理 むり
"I can't" / "I'm done" — the one-word shutdown for when you've hit your limit, good or bad.
Casual
9
ネタバレ ねたばれ
Spoiling a story's plot — the Japanese word for 'spoiler.'
Casual
10
ンゴ んご
A suffix from 2ch/5ch forums — add "-ngo" to sentences for self-deprecating humor
Casual
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What is YabaiDict?
A guide to real Japanese — slang, casual expressions, and everyday phrases that textbooks won't teach you. Every entry is written and reviewed by native speakers living in Japan, not translated by someone who studied Japanese in college.
Most "Japanese slang" content online is either outdated lists or AI-generated fluff with zero nuance. We keep this dictionary current, honest, and actually useful. If a word sounds dated, makes you look like an old man, or will get you weird looks — we'll tell you.
Made in Japan
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Actually current
Updated regularly with new slang as it emerges
Real context
When to use it, when not to, and how it actually sounds