US informal (of a television series or film) reach a point when far-fetched events are included merely for the sake of novelty, indicative of a decline in quality
〈美, 非正式〉（电视系列剧, 电影）为求新奇而加入牵强情节（显示质量的下降）; 哗众取宠。
ORIGIN: said to be with allusion to the long-running US television series Happy Days,in which the central character (the Fonz) jumped over a shark when waterskiing.