口くちにチャック

expression

zip it!; shut it!; be quiet!

Colloquial command telling someone to stop talking, literally 'zip your mouth'. Often used in informal, sometimes playful contexts.

See also: チャック

• うるさいなあ。口くちにチャック！

  You're so noisy. Zip it!

expression

I'll shut up; I'll keep quiet

Colloquial expression used by the speaker to indicate they will stop talking, often after being told to be quiet or realizing they've said too much.

• あ、ごめん。口くちにチャックするね。

  Oh, sorry. I'll shut up now.