The paper I had in my pocket got crumpled.
I went out wearing a wrinkled shirt.
くしゃくしゃ is a mimetic word for something crumpled or messy, often used for hair or paper, and can also describe a crumpling sound or action.
Usually written in kana; the kanji form 皺くちゃ is rare and 皺苦茶 is ateji.
Rare kanji form; the second character is kana.
Katakana spelling, mainly for emphasis or search; not a common written form.
Ateji spelling; rarely used.
The word is likely a compound of しわ (wrinkle) and くちゃ, a mimetic element suggesting crumpled or messy state. The exact derivation is uncertain.