na-adjective, noun
Describes a state of extreme disorder, mess, or ruin. Often used for physical spaces, plans, or situations that have fallen apart.
部屋がめちゃめちゃに散らかっている。
The room is a complete mess.
My plans were ruined by the typhoon.
na-adjective, noun
absurd; unreasonable; excessive
Used for actions, ideas, or demands that are wildly unreasonable, rash, or over the top. Often carries a negative judgment.
そんなめちゃめちゃな要求は受け入れられない。
I can't accept such an unreasonable demand.
彼はめちゃめちゃなスピードで車を飛ばした。
He drove the car at a reckless speed.
adverb
Adverbial use meaning 'extremely' or 'incredibly'. Common in casual speech to intensify adjectives or verbs.
このラーメン、めちゃめちゃおいしい!
This ramen is incredibly delicious!
昨日はめちゃめちゃ疲れた。
I was extremely tired yesterday.