Jisho

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Na-adjective (keiyodoshi)
1. nonsensical; unreasonable; absurd; unrealisticUsually written using kana alone, Yojijukugo (four character compound)
Na-adjective (keiyodoshi)
2. awfully; extremely; to excess; senseless; recklessUsually written using kana alone
Noun, Na-adjective (keiyodoshi)
3. disorder; confusion; being jumbled; being mixed upUsually written using kana alone
Adverb (fukushi)
4. very; extremely; excessivelyColloquial, Usually written using kana alone
Other forms
ムチャクチャ
Notes
無茶苦茶: Ateji (phonetic) reading.

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