口が軽い

unable to keep secrets

→ 口

phrase Rare #41,989

unable to keep secrets Describes someone who readily reveals confidential information or talks too freely. Often translated as “loose-lipped” or “a blabbermouth.”

JA: 彼は口が軽いから、秘密は話さないほうがいい。

EN: He can't keep secrets, so you'd better not tell him.

トムは口が軽い。

Tom can't keep a secret.

彼は口が軽い。

He can't keep a secret.

彼女は口が軽い。

She can't keep a secret.

あいつ、ほんと口が軽いからな。

He's really loose-lipped, you know.