Categories Back to the Future You’re so gullible, McFly! Post author By quotegeek Post date May 16, 2012 No Comments on You’re so gullible, McFly! Biff: You’re so gullible, McFly! → I’m a Sagittarius, which probably tells you way more than you need to know. Leave a Reply Cancel replyYou must be logged in to post a comment.