口くちを入いれる

expression, ichidan verb

throw in a suggestion; put in one's two cents; interject

Used when someone offers an opinion or suggestion in a conversation, often casually or without being asked. Can carry a slight nuance of butting in.

• 会かい議ぎで彼かれはよく口くちを入いれる。

  He often throws in suggestions during meetings.

• 二人ふたりの話はなしに口くちを入いれるのはやめておこう。

  I'll refrain from butting into their conversation.