《报告老师！怪怪怪怪物！》是由九把刀执导，邓育凯,蔡凡熙,陈珮骐,刘奕儿主演的恐怖片。该电影于2017年在大陆上映。《怪物》描述邓育凯饰演的好学生长期被班上风云人物三人组作弄，某天四个人意外发现吃人的人形小怪物，进而延伸出“霸凌”议题，此主题也是九把刀十多年前看完瑞典电影《邪恶》受到启发后，一直想探讨的主题。原本他想以1500万台币低成本拍成“霸凌伪纪录片”，后期转变成剧情特效片，不但在中影搭棚，也特地在西门钉封街拍动作戏，制作费提高到一亿台币，大部份成本投入特效制作。九把刀透露，原本电影设定走写实暴力路线，但自己和素人演员无法掌握，最后决定做自己走回黑色幽默风格。
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