to slap something together 草率地完成（非正式）

英文释义

(INFORMAL) To assemble something hastily, usually without any attention to quality or permanence.

例句

Please give me advance notice about meetings at which I speak because I want time to prepare properly, instead of just slapping a quick presentation together.

请提前通知需要我讲话的会议，因为我想花些时间做准备，不想草草说两句就收场。