Fetching details from the dictionary...

absurd; unreasonable; nonsensical; preposterous; incoherent
extreme; senseless; reckless; wanton
disorderly; chaotic; confused; messy
incredibly; really; so; super
台風で部屋がめちゃくちゃになってしまった。
The room became a mess because of the typhoon.
彼の計画はめちゃくちゃで全く理解できない。
His plan is absurd and I can't understand it at all.
酔っ払ってめちゃくちゃなことを言っていた。
He was drunk and saying absurd things.