《蠢蛋搞怪秀4.5：坏外公》是由无执导，约翰尼·诺克斯维尔主演的剧情片。该电影于2014年在美国上映。Bad Grandpa .5 gives you a whole new perspective on the world of Irving Zisman with bonus scenes and pranks also featuring Spike Jonze as "Gloria" and Catherine Keener as Irving's wife "Ellie", plus a look at the evolution of Johnny Knoxville's naughty alter-ego, the makeup effects,