Meanings
Usage patterns
無茶をするto do something reckless/rash
Don't be reckless by driving that fast.
無茶を言うto say something unreasonable/absurd
Don't say something unreasonable like finishing it all in one day.
無茶な〈事〉an absurd/unreasonable ~ (plan, demand, etc.)
His plan was an utterly unreasonable thing.
無茶な運転reckless driving
Driving recklessly in the rain is dangerous.
むっちゃ〈形容詞〉very ~ (Kansai-style intensifier before an adjective)
This ramen is really delicious!