行っちゃダメ

must not go

→ 行く
phrase Uncommon #14,837
must not go A casual contraction of 行ってはダメ, used to say that someone must not go or is not allowed to go. The pattern ~ちゃダメ can follow other verbs to mean “must not ~.”
JA: まだ一人で行っちゃダメだよ。
EN: You mustn't go alone yet.

行っちゃダメ

Don't go.

— クワイエット・プレイス (2018)

まで行っちゃダメ

Don’t go all the way to the edge.

— ROMA/ローマ (2018)

どこにも行っちゃダメ

Don’t go anywhere, okay?

でも行っちゃダメ

But you mustn't go.

— 嵐の中で (2018)

まだ行っちゃダメ

You can't leave yet.

— グッドフェローズ (1990)

行っちゃダメだよ

Don't go.

— 炎628 (1985)

パコ行っちゃダメ

Paco, don't go!

— ROMA/ローマ (2018)