jump the shark
到达或过了顶峰或巅峰，进入衰退或走下坡路的阶段
口语·形容事物走下坡路
英文释义
to reach a point where something becomes ridiculous, absurd, or out of touch with its original purpose or quality
例句
That TV show really jumped the shark after the main character left.
典故来源
源自美剧《欢乐时光》中主角跳过鲨鱼的荒诞情节，比喻作品质量下降。