口くちの軽かるい

expression, i-adjective

loose-tongued; talkative; indiscreet

Describes someone who cannot keep secrets or speaks too freely. Often used critically. Compare with 口が軽い, which is the predicative form.

See also: 口が軽い

• 彼かれは口くちの軽かるい人ひとだから、秘ひ密みつは話はなさないほうがいい。

  He's a loose-tongued person, so you'd better not tell him secrets.

• 口くちの軽かるい同どう僚りょうにうっかり大だい事じなことを話はなしてしまった。

  I carelessly told an important matter to my indiscreet colleague.