Fetching details from the dictionary...

nonsensical; unreasonable; absurd; unrealistic
awfully; extremely; to excess; senseless; reckless
disorder; confusion; being jumbled; being mixed up
very; extremely; excessively
台風の後、部屋の中がむちゃくちゃになっていた。
After the typhoon, the room was in complete disarray.
彼の説明はむちゃくちゃで何を言いたいか不明だ。
His explanation was so incoherent that no one could follow.
むちゃくちゃなスケジュールを組まないでほしい。
Please do not set up such an unreasonable schedule.