しちゃダメよ

you mustn't

→ 為る

phrase Rare #22,787

you mustn't A conversational contraction of してはダメよ, used to tell someone not to do something. The よ adds emphasis.

JA: 無理しちゃダメよ。

EN: You mustn't overdo it.

気にしちゃダメよ

Don't let it bother you.

— PERFECT BLUE (1998)

自殺なんかしちゃダメよ。

You mustn't commit suicide.

そんな難しい質問、私にしちゃダメよ。

You shouldn't ask me such a difficult question.

つまみ食いしちゃダメよ

Don't sneak a taste.

— ウエスタン (1968)

ジーンくん遅刻しちゃダメよ！

Gene, don't be late!

— Pompo the Cinephile (2021)