noun, noun which may take the genitive case particle 'no', na-adjective
Describes a chaotic mixture of things, often with a negative or disorderly nuance. Can be used as a noun or adjectivally with な or の.
引き出しの中がごちゃまぜになっている。
The inside of the drawer is all jumbled up.
いろんな書類がごちゃ混ぜに置いてあった。
Various documents were left in a messy pile.
ごちゃごちゃ is an adverb/adjective describing a cluttered or messy state, often used for physical disorder or noise. ごちゃ混ぜ emphasizes the mixing of different elements into a chaotic whole.
混ぜこぜ also means a mixture or jumble, but is less common and can sound more colloquial or childish than ごちゃ混ぜ.
The word is a compound of the mimetic element ごちゃ (suggesting disorder) and 混ぜ (maze, 'mixing'). The exact derivation is uncertain, but it likely arose as an emphatic expression for a chaotic mixture.