expression, ichidan verb
interrupt with silly remarks; butt in; make teasing comments
Used when someone cuts into a conversation or activity with frivolous jokes, teasing, or unnecessary comments, often in a lighthearted but annoying way.
真面目な話をしているときに茶々を入れないでください。
Please don't interrupt with silly remarks when we're having a serious conversation.
彼
He kept butting in with jokes during the meeting and made everyone laugh.