口くち任まかせ

noun

random talk; speaking without thinking; offhand remarks

Refers to saying whatever comes to mind, often carelessly or without responsibility. Commonly used in the phrase 口任せに言う.

• 彼かれは口くち任まかせに適てき当とうなことを言いった。

  He said something off the top of his head without thinking.

• 口くち任まかせの返へん事じは信しん用ようできない。

  You can't trust an answer given on a whim.