idiom · to crack jokes or engage in buffoonery to liven things up in a conversation or social situation

他在席间不断插科打诨，引得大家哄堂大笑。

idiom · to include impromptu comic material or humorous interludes in a traditional opera performance

老艺人在表演中经常插科打诨，以此活跃舞台气氛。